AI
Understand and use AI through bounded browser experiments.
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Choose a subject below, then a course within it. Each course explains its units and lessons, so you know where you are before you begin.
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Choose a subject to view its courses. Find the right course for your interests, then begin with its lessons.
Mathematics
School through undergraduate mathematics, with guided investigations, proof practice and cumulative projects. The comprehensive program is in development.
View coursesData literacy and statistics
Investigate whose data you see and what a summary hides.
View coursesApplied mathematics
Use rates, geometry and constraints to test everyday decisions.
View coursesProgramming and software engineering
Inspect algorithms and repair failures with explicit contracts and counterexamples.
View coursesMoney, economics and business
Explore pricing, costs and uncertain demand in fictional markets.
View coursesScience
Investigate measurements, fair tests and scientific explanations. Explore authored school, AP preparation and college-level pathways, with course-specific scope and evidence limits.
View coursesPhysics and engineering
Investigate nonlinear motion and power trade-offs by inspecting quantities with units.
View coursesSystems thinking and operations
Explore queues and bottlenecks before recommending extra capacity.
View coursesEnvironment and sustainability
Balance flows over time and inspect the trade-offs hidden by totals.
View coursesCybersecurity and digital literacy
Repair permissions and test recovery goals in safe, fictional systems.
View coursesCommunication and evidence-based writing
Choose honest denominators and assemble evidence for a concise recommendation.
View coursesDesign and product development
Test improvements against task completion and inspect who gets excluded.
View coursesMedia literacy and civic reasoning
Investigate survey headlines and trace repeated claims back to their observations.
View coursesEnglish language arts
Read closely, challenge interpretations, create and revise. Hands-on literary and writing studios for high-school and college learners.
View coursesSocial studies
Investigate history, institutions, places, markets and behavior. Build claims you can support with evidence.
View coursesCourses for different goals
The twelve additional subjects offer course sequences, editable artifacts and cumulative projects. Choose school, college or workplace applications at any stage. Each subject brings its course choices together so you can decide where to begin. Project rubrics distinguish saved work from independently reviewed proficiency.
Course and site map
Courses / subject / course / unit / lesson. Choose a subject, then a course. Open a course to see its complete lesson sequence and choose where to begin.
This is a navigable map of published course destinations, not an XML sitemap or a prerequisite graph. Shared lessons keep the same saved work wherever you enter them. Course pages describe their current scope and any work still in development.
AI2 course destinations
View AI courses- Neural Networks
Units and lesson access
- How does a network learn?
- What has the network learned?
- How does AI process language?
- Why does AI need computation?
- Data audits and training diagnosis
- Simple models and useful baselines
- Generative models beyond text
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- Build AI Systems
Units and lesson access
- Learning through actions
- Planning and reasoning
- Learning without losing old skills
- Connecting tools and specialists
- Memory and shared working state
- Choosing what to do next
- Testing whether improvement is real
- Assemble an experimental agent
- Geometry and control foundations
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Mathematics105 course destinations
View Mathematics courses- Real skew-adjoint geometry and complex structures
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- Finite Fourier bases, convolution and FFT
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- Positive matrices, factors and energy
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- Exact factorization and repeated solves
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- Determinants from permutations to certificates
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- Linear algebra over finite fields
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- Network incidence and the four spaces
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- Sequence spaces and completeness
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- Constructing the real numbers
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- Picard construction and uniqueness
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- Weighted integration and jump conventions
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- Compactness of function families
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- Discontinuities and Riemann integration
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- Tail limits and root tests
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- Joint information and adaptive strategies
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- Probability protocols and expected work
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- Arrival processes, absorption and honest simulation
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- Matching completions, families and unequal sides
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- Triangle-free coloring certificates
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- Binary gcd and integer certificates
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- Relation closure and directed reachability
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- Infinite cardinality through explicit constructions
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- Domains, invariants and structural counting
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- Set specifications and language-expression limits
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- Directed random walks and stationary guarantees
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- Finite sampling guarantees and dependence
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- Collisions, collection and waiting times
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- Growth estimates and controlled approximation
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- Orders, graph representations and certificates
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- Stable matching and preference guarantees
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- Boolean specifications, certificates and circuits
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- Discrete synthesis: schedules, sampling and certificates
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- Encodings, diagonal arguments and limits of algorithms
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- Algorithm reasoning: invariants, termination and cost
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- Structural induction: constructions, recursion and parsing
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- Precalculus extensions: motion, matrices and transitions
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- Precalculus: polar curves and signed-radius evidence
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- Precalculus: periodic and reciprocal graph evidence
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- Precalculus: semilog scales and model evidence
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- Precalculus: exponential and logarithmic evidence
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- Precalculus: constructing and validating polynomial models
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- Precalculus: local rates and polynomial evidence
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- Distribution diagnostics and calibration
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- Statistical PCA: coordinates, reconstruction and scaling
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- Fitted regression: coefficients, uncertainty and validation
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- Generalized linear models: fitting and evidence
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- Inference workflows: calculate, check and conclude
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- Distribution calculations: events, tails and cutoffs
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- Statistics: displays, designs and differences
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- Calculus synthesis: regions, motion and approximation
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- Calculus through supplied graphs and measured tables
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- Statistical investigations, simulation and probability decisions
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- Geometric constructions, circle proofs and coordinate loci
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- Geometric definitions, motion witnesses and theorem proofs
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- Sections, solid measures and geometric design
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- Algebra reasoning, constraints and solution evidence
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- Real numbers, complex coordinates, vectors and matrices
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- Functions in graphs, measurements and growth decisions
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- School trigonometry: proofs, inverse branches and periodic decisions
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- Algebra foundations: expressions, equations and roots
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- Algebra II and precalculus: functions and structure
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- Euclidean and coordinate geometry foundations
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- Trigonometry, polar geometry and precalculus representations
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- Proof foundations: from claims to arguments
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- Linear Algebra I: systems, spaces and linear maps
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- Single-variable calculus foundations
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- Differential calculus: techniques and applications
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- Integral calculus: accumulation, methods and applications
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- Calculus II: series, curves and applications
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- Statistics foundations: data, design and sampling variability
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- Discrete structures: counting, graphs and algorithms
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- Statistical inference: estimates, tests and defensible conclusions
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- Multivariable calculus: geometry, change and accumulation
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- Differential equations: models, methods and dynamics
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- Calculus-based probability: laws, dependence and limits
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- Real Analysis I: completeness, limits and rigorous calculus
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- Abstract algebra I: groups and symmetry
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- Linear Algebra II: operators and spectral structure
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- Real Analysis II: uniform limits, metric spaces and local calculus
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- Abstract algebra II: rings, fields and Galois foundations
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- Numerical analysis: algorithms, errors and evidence
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- Mathematical statistics: derivation and model criticism
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- Complex analysis: holomorphic functions, contours and mappings
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- Elementary number theory: divisibility, reciprocity and Diophantine equations
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- Optimization: models, certificates and algorithms
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- Point-set topology: spaces, constructions and separation
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- Homotopy, fundamental groups and covering spaces
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- Axiomatic Euclidean and non-Euclidean geometry
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- Combinatorics and graph theory: enumeration, structure and certificates
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- Partial differential equations and Fourier methods
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- Mathematical modeling and senior investigation
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- Differential geometry of curves and surfaces
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- Measure, Lebesgue integration and the probability bridge
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- Quantitative reasoning and numerical sense
Units and lesson access
- Parts, wholes and proportional change
- Units, estimates and powers of ten
- Use quantities to make and explain a choice
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- Algebra, functions and mathematical modeling
Units and lesson access
- From situations to linear rules
- Solve and combine constraints
- Quadratic and exponential relationships
- Make the algebra serve a decision
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- Geometry and trigonometry
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- Probability, uncertainty and expected outcomes
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- Statistics: from samples to qualified conclusions
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- What was observed and retained?
- Describe shape and variation
- Estimate and test
- Relationships and fair comparisons
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- Linear algebra: directions, systems and approximation
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- Calculus: local rates and accumulated change
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- From intervals to local rates
- Recover total change
- Follow several changing quantities
- Make a constrained choice
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- Discrete mathematics: logic, proof and algorithms
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- Optimization: feasible choices and competing goals
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- Numerical methods and dynamical systems
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- Functions and graphs
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- Mathematics for AI
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Data literacy and statistics1 course destinations
View Data literacy and statistics courses- Data: from records to defensible conclusions
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Applied mathematics1 course destinations
View Applied mathematics courses- Mathematical models for practical choices
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Programming and software engineering1 course destinations
View Programming and software engineering courses- Build, test and operate a small data tool
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Money, economics and business1 course destinations
View Money, economics and business courses- Money and business decisions from explicit models
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Science29 course destinations
View Science courses- Design evidence that can change your mind
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- University Physics III — thermal, optical and modern evidence
Units and lesson access
- Kinetic distributions and thermal state evidence
- Entropy, irreversible processes and thermal limits
- Wave amplitudes, aperture integrals and imaging evidence
- Spacetime events, worldlines and conserved four-momentum
- Quantum evidence and introductory wave mechanics
- Atoms, statistical matter and nuclear evidence
- Cross-category evidence defense and independent transfer
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- Introductory Microbiology
Units and lesson access
- Module 1 — Microbial diversity and microscopy evidence
- Module 2 — Population records, metabolism and environmental boundaries
- Module 3 — Genetic information, ancestry and transfer evidence
- Module 4 — Communities, biogeochemical roles and useful-process boundaries
- Module 5 — Host defenses, immune context and epidemiological evidence
- Module 6 — Control mechanisms, resistance and bounded interpretation
- Whole-course source-aware defense and unfamiliar transfer
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- Introductory Astronomy
Units and lesson access
- Sky geometry, time and source-image observation
- Orbital time, binary inference and conservation boundaries
- Light, calibration and actual spectral evidence
- Planetary interiors, histories and selected signals
- Stellar measurements, support and evolutionary evidence
- Galaxies, calibrated distances and cosmic evidence
- Integrated source inference and whole-course defense
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- University Physics II with calculus
Units and lesson access
- Cumulative coupled-system and calibration defense
- Induction, oscillating circuits and Maxwell evidence
- Magnetic source integrals, vector dynamics and spatial inference
- Current density, initial-value circuits and transient evidence
- Conductors, capacitance, material profiles and energy constraints
- Flux, symmetry, reference levels and potential consistency
- Continuous charge: geometry, convergence and spatial evidence
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- College Physics II — algebra-based fields and evidence
Units and lesson access
- Charge, fields, potential and measurement
- DC topology, instruments and electrical energy
- Magnetic force, induction and energy transfer
- Wave propagation, boundaries and acoustic evidence
- Optical geometry, phase and calibrated evidence
- Photon, atomic and nuclear measurement evidence
- Cumulative sensing, calibration and model-selection evidence
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- AP Physics C: Electricity and Magnetism — calculus field models
Units and lesson access
- Full-course electromagnetic evidence defense
- Induced fields, state equations and energy
- Magnetic sources, force and symmetry
- Current integrals, circuit topology and RC states
- Conductors, capacitance and dielectric boundaries
- Potential, gradients and accessible energy
- Charge distributions, fields and flux
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- Human Anatomy and Physiology Foundations
Units and lesson access
- Module 1 — Tissue evidence, organization and internal boundaries
- Module 2 — Integument, skeleton and muscle
- Module 3 — Neural and endocrine regulation
- Module 4 — Circulation, respiration and transport
- Module 5 — Digestion, metabolism, renal and fluid regulation
- Module 6 — Immunity, reproduction and integrated homeostasis
- Full-course anatomical evidence and mechanism defense
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- Physical Geology and Earth Systems
Units and lesson access
- Minerals, rocks and material processes
- Geologic time and stratigraphic inference
- Plate reconstruction and interior evidence
- Deformation, earthquakes and volcanic evidence
- Rivers, groundwater, glaciers and coasts
- Resources, site histories and bounded environmental decisions
- Full-course site history and evidence defense
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- University Physics I with calculus
Units and lesson access
- Differential and integral motion evidence
- Force equations, resistance and constraint events
- Line work, potential structure and energy evidence
- Momentum boundaries and extended-system moments
- Rotational moments and central-field evidence
- Differential oscillations, waves and fluid profiles
- Cumulative calculus evidence and independent model comparison
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- College Physics I — algebra-based measurement and mechanics
Units and lesson access
- Measurement, vectors and motion
- Force evidence, contact and circular motion
- Work, energy and momentum evidence
- Angular records, statics, rotation and elastic limits
- Fluid pressure, constraints and transport evidence
- Thermal systems, oscillators and introductory waves
- Cumulative algebra-based evidence and project
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- AP Physics 1: algebra-based mechanics
Units and lesson access
- Unit 1 — Kinematics
- Unit 2 — Force and translational dynamics
- Unit 3 — Work, energy and power
- Unit 4 — Linear momentum
- Unit 5 — Torque and rotational dynamics
- Unit 6 — Energy and momentum of rotating systems
- Unit 7 — Oscillations
- Unit 8 — Fluids
- Full-course synthesis and evidence audit
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- AP Environmental Science
Units and lesson access
- Ecosystem processes and evidence
- Biodiversity and ecological change
- Population processes and demographic evidence
- Earth systems and resource evidence
- Land and water use: compare solutions and displaced impacts
- Energy resources, conversion and consumption
- Atmospheric pollution: sources, transformations and controls
- Aquatic and terrestrial pollution: pathways, effects and evidence
- Global change: atmospheric mechanisms, oceans and biodiversity
- Cumulative evidence and revision
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- AP Physics 2: algebra-based thermal, electromagnetic and optical systems
Units and lesson access
- Full-course synthesis and capstone
- Unit 15 — Modern physics
- Unit 9 — Thermodynamics
- Unit 10 — Electric force, field and potential
- Unit 11 — Electric circuits
- Unit 12 — Magnetism and electromagnetism
- Unit 13 — Geometric optics
- Unit 14 — Waves, sound and physical optics
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- General Chemistry I
Units and lesson access
- Measurement and chemical accounting
- Atoms and electronic structure
- Periodic properties and bonding
- Molecular geometry and intermolecular interactions
- Stoichiometry, solutions and gases
- Thermochemistry and material evidence
- Full-course evidence synthesis
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- General Biology I: cellular mechanisms and quantitative evidence
Units and lesson access
- Module1 — Scientific evidence and biological chemistry
- Module2 — Cells, microscopy and membranes
- Module 3 — Enzymes, respiration and photosynthesis
- Module 4 — Signaling and cell division
- Module 5 — Mendelian and chromosomal inheritance
- Module 6 — Molecular genetics, regulation and evidence
- Course-wide synthesis and project defense
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- AP Physics C: Mechanics — calculus-based modeling
Units and lesson access
- Calculus kinematics and evidence
- Forces, differential equations and constraints
- Work, potential and evidence integrals
- Momentum integrals, systems and collisions
- Torque and distributed rotational inertia
- Rotational work, angular momentum and contact events
- Calculus oscillations and parameter evidence
- Full-course calculus mechanics evidence defense
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- Environmental Science: ecological systems and evidence
Units and lesson access
- Systems, ecological processes and scale
- Population and biodiversity measurement
- Earth systems and resource budgets
- Energy, agriculture and water services
- Pollution and climate evidence
- Intervention design, uncertainty and monitoring
- Cumulative district decision and evidence defense
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- General Biology II: diversity, organismal mechanisms and population evidence
Units and lesson access
- Module1 — Evolution and population genetics
- Module2 — Phylogenetics and biodiversity
- Module 3 — Microbes, fungi and ecological roles
- Module 4 — Plant structure, development and transport
- Module 5 — Comparative animal organization and regulation
- Module 6 — Behavior, populations, communities and ecosystems
- Course synthesis — Cross-scale biological evidence
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- General Chemistry II
Units and lesson access
- Solution behavior and colligative evidence
- Kinetic inference and mechanism constraints
- Equilibrium constraints, finite inventories and inverse evidence
- Acid/base analytical balances, finite buffers and endpoint evidence
- Solubility, finite ligand and coupled free-species evidence
- Thermodynamic driving forces, electrical budgets and introductory nuclear/coordination evidence
- Independent evidence and finite-process synthesis
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- Scientific inquiry and measurement
Units and lesson access
- Questions and explanations
- Measurement and calibration
- Fair tests and replication
- Selection and uncertainty
- Models and transfer
- Procedures and scientific claims
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- Biology and living systems
Units and lesson access
- Cells, scale and organization
- Membranes and transport
- Enzymes and controlled rate investigations
- Photosynthesis, respiration and carbon
- Information, division and inheritance
- Evolution and diversity
- Organisms and regulation
- Populations, communities and ecosystems
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- Chemistry and matter
Units and lesson access
- Particles, formulas and conservation
- Electron structure, bonding and molecular shape
- Mass, moles and reaction quantities
- Solution amount, concentration and preparation
- Density, displacement and evidence quality
- Mixtures, solubility and separation
- Gas states, temperature and mixtures
- Heat, phase changes and reaction energy
- Reaction rates and time-dependent evidence
- Reversible reactions and equilibrium
- Acids, bases and neutralization
- Oxidation, reduction and electron accounting
- Polymers and material resource decisions
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- Physics and physical systems
Units and lesson access
- Position, motion and reference frames
- Forces, systems and Newton’s laws
- Work, energy and conservation
- Momentum, impulse and collisions
- Torque, rotation and angular momentum
- Pressure, buoyancy and fluid motion
- Temperature, heat and thermal systems
- Oscillations and waves
- Light, rays and optical systems
- Electric charge, fields and circuits
- Magnetic forces and induction
- Modern evidence and limits of classical models
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- Earth and space science
Units and lesson access
- Geological time and evidence
- Minerals and Earth materials
- Plate motion and dynamic Earth
- Land, water and watersheds
- Atmosphere and oceans
- Earth in space
- Climate and planetary energy
- Stars and cosmic evidence
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- Environmental science and sustainability
Units and lesson access
- Water allocation and observed variability
- Land, living systems and nutrient accounting
- Pollutant pathways, fate and evidence
- Energy service, storage and lifecycle
- Urban systems, transport and resilient decisions
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- Engineering design and scientific computing
Units and lesson access
- Requirements, models and fair comparisons
- Thermal models and controlled prototypes
- Circuit diagnosis with limited readings
- Sensors, feedback, delay and limits
- Failure analysis and design tradeoffs
- Reproducible analysis and design communication
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- AP Biology — mechanisms and evidence
Units and lesson access
- Chemistry of life — opening investigations
- Cell structure and function — opening investigations
- Cellular energetics — mechanisms and evidence
- Cell communication and cell cycle
- Heredity
- Gene expression and regulation
- Natural selection
- Ecology
- Cumulative investigations and review
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- AP Chemistry preparation
Units and lesson access
- Thermodynamic direction and electrochemical evidence
- Water ionization and acid-base evidence
- Dynamic balance and conserved composition
- Heat measurement and reaction-energy evidence
- Reaction-rate evidence and model discrimination
- Reaction species and conserved change
- Optical signals and inference limits
- Species inventories and solution representations
- Molecular motion and full distributions
- Vapor inventories and supported phase conditions
- Atomic and composition evidence
- Configurations, ionization and attraction
- Periodicity, valence and evidence limits
- Bond potentials and structural representations
- Molecular shape and local orbital models
- Reference measurements and matched comparisons
- Ionic ordering and metallic alloy representations
- Material properties and independent representations
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Physics and engineering1 course destinations
View Physics and engineering courses- Model, constrain, control and troubleshoot
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Systems thinking and operations1 course destinations
View Systems thinking and operations courses- Operate a system, not an isolated metric
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Environment and sustainability1 course destinations
View Environment and sustainability courses- Evaluate resource choices over time
Units and lesson access
- Track resources through time
- Compare equal services and full horizons
- Make a feasible resource decision
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Cybersecurity and digital literacy1 course destinations
View Cybersecurity and digital literacy courses- Protect, verify and recover
Units and lesson access
- Personal access and verification
- Application boundaries and incident response
- Recovery and organizational maintenance
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Communication and evidence-based writing1 course destinations
View Communication and evidence-based writing courses- Explain, substantiate and recommend
Units and lesson access
- Clear instructions and honest numbers
- Evidence selection and chart design
- Research reports and proposals
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Design and product development1 course destinations
View Design and product development courses- Discover, prototype and improve
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Media literacy and civic reasoning1 course destinations
View Media literacy and civic reasoning courses- Trace claims and reason about public decisions
Units and lesson access
- Original records and independent evidence
- Polls and numerical headlines
- Policy evidence and distribution
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English language arts8 course destinations
View English language arts courses- Read like a literary detective
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- Write with purpose
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- Poetry, drama and performance
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- Stories and creative writing
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- Rhetoric, media and public voice
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- College composition
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- Literary inquiry and interpretation
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- Research, editing and publishing
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Social studies43 course destinations
View Social studies courses- Historical inquiry and local history
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- Historical methods and public history
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- United States history
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- AP United States History investigations
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- United States history I: through 1877
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- United States history II: after 1877
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- World history and global connections
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- AP World History: Modern investigations
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- World history I: early societies–c.1450
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- World history II: c.1450–present
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- European history
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- AP European History investigations
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- European history survey
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- African American studies and community histories
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- AP African American Studies investigations
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- Introduction to African American studies
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- Civics and United States government — High school
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- Civics and United States government — AP preparation practice
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- Civics and United States government — Introductory college
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- Comparative politics — High school
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- Comparative politics — AP preparation practice
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- Comparative politics — Introductory college
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- International relations — High school
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- International relations — Introductory college
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- Psychology and human behavior — High school
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- Psychology — selected AP-topic practice
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- Psychology and human behavior — Introductory college
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- Sociology and social institutions — High school
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- Sociology and social institutions — Introductory college
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- Cultural, linguistic and archaeological inquiry — High school
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- Cultural, linguistic and archaeological inquiry — Introductory college
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- Media and civic inquiry — High school
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- Media and civic inquiry — Introductory college
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- Social research methods — High school
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- Social research methods — Introductory college
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- Human geography and world regions
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- Economics and public choices
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- AP Human Geography practice
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- AP Microeconomics practice
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- AP Macroeconomics practice
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- Introduction to human geography
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- Principles of microeconomics
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- Principles of macroeconomics
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