First visit
Start cleanly
Open one strong concept first.
If you have not started anything yet, open a strong first concept or move straight into the starter tracks.
Open Model Lab
Start from one live model, then learn by changing it.
Open one simulation, keep the graph and controls in view, and follow the next idea only when it helps. Start here chooses the first move. Browse and search stay close when you want more control.
Need a different route after that first move? Browse Subjects, Guided collections, or Challenges.
Live bench
The live bench stays first so the next step comes from the model instead of from a pile of route choices.
Pick up where you left off
Resume saved work or open a strong first concept.
Continue learning
Resume saved work or take the next bounded step.
Keep the next concept, track, or review action visible without turning the homepage into a full dashboard.
Local-first by default, synced when you sign in
Starter track5 concepts
Gravity and Orbits
Start with one source mass creating a field and potential well, then use that same gravity model to explain circular speed, orbital periods, and the escape threshold.
Inverse-square fieldPotential well
Explore nextExplore next
Start with the concept library or a topic route.
If you want a broader map before you begin, open the concept library or topic routes next.
Browse next
Browse directly when you want a clearer map.
93 concepts stay in one shared library. Open the wider routes only when you want a bigger map.
PhysicsOscillations
Simple Harmonic Motion
See one repeating system from displacement to acceleration and back again, with the math tied directly to the motion on screen.
A strong first concept for opening the catalog without committing to a full track.
Open SHMMathFunctions
Graph Transformations
Move one parent curve with honest controls so shifts, vertical scale, and reflections stay tied to the same overlaid graph and landmark points.
ChemistryRates and Equilibrium
Reaction Rate / Collision Theory
Keep one chemistry box visible so temperature, concentration, activation threshold, and catalysts can be read as changes in successful collisions instead of chemistry slogans.
01
See the system
Each concept starts with a live bench so the idea arrives after the behavior makes sense.
02
Change one thing
Controls stay tied to meaningful parameters, so cause and effect stay obvious while you explore.
03
Read the graph or readout
The page pairs the live bench with labeled graphs, planes, and readouts rather than hiding the relationship.
Direct start
Simple Harmonic Motion
Open one strong concept first, then let the live page widen the path from there.
Open SHMStarter track
Gravity and Orbits
5 linked concepts when you want a short ordered path instead of a cold library scan.
Start Gravity and OrbitsGuided starts
Show sequenced starts
Open these when you want a short guided path instead of a free browse.
Guided starts
Show sequenced starts
Open these when you want a short guided path instead of a free browse.
Starter tracks
Browse all tracksStarter track5 concepts135 min
Gravity and Orbits
Start with one source mass creating a field and potential well, then use that same gravity model to explain circular speed, orbital periods, and the escape threshold.
Starts with Gravitational Fields across 5 concepts.
Starter track6 concepts139 min
Functions and Change
Keep the first math path compact: read parent-curve moves first, then rational asymptotes and domain breaks, then exponential growth and decay, local slope, visible limit behavior, and finally accumulation so change stays graph-first all the way through.
Starts with Graph Transformations across 6 concepts.
Starter track2 concepts50 min
Rates and Equilibrium
Start with successful collisions setting reaction rate, then reuse the same chemistry language inside a reversible system that re-balances after a disturbance.
Starts with Reaction Rate / Collision Theory across 2 concepts.
Guided collections
Browse all collectionsLesson set4 steps9 concepts
Waves Evidence Loop
Use one topic route, one starter track, and one focused challenge so the wave story stays bounded for a teacher-led lesson block.
A sequenced set of 9 concepts.
Lesson set6 steps6 concepts
Electricity Bridge Lesson Set
Move from field cause to voltage to the first full electricity track without leaving the current concept, topic, and challenge surfaces.
A sequenced set of 6 concepts.
Playlist5 steps11 concepts
Electricity to Magnetism Bridge
Use the existing electricity recap, magnetic starter track, and Maxwell capstone surfaces to move into electromagnetism without turning the branch into a full LMS sequence.
A sequenced set of 11 concepts.
Lesson set4 steps7 concepts
Functions and Change Lesson Set
Use the functions topic route, the existing graph-first starter track, one accumulation checkpoint, and the calculus topic route so the early math branch stays compact for a teacher-led lesson block.
A sequenced set of 7 concepts.
Lesson set4 steps7 concepts
Vectors to Mechanics Bridge
Use the vectors topic route, the short bridge track, one endpoint checkpoint, and the mechanics topic route so the math-to-motion handoff stays compact and teacher-usable.
A sequenced set of 7 concepts.
Lesson set4 steps9 concepts
Complex and Parametric Motion Lesson Set
Use the complex-and-parametric topic route, the authored starter track, one parametric-motion checkpoint, and the vectors topic route so the plane-based math branch stays compact and teacher-usable.
A sequenced set of 9 concepts.
Lesson set4 steps6 concepts
Rates and Equilibrium Lesson Set
Use the chemistry topic route, the compact starter track, one rebalance checkpoint, and the solutions-and-pH topic route so the chemistry branch feels packaged instead of isolated.
A sequenced set of 6 concepts.
Lesson set4 steps7 concepts
Stoichiometry and Yield Lesson Set
Use the stoichiometry topic route, the compact starter track, one percent-yield checkpoint, and the solutions-and-pH topic route so chemistry quantities stay bounded and teacher-usable.
A sequenced set of 7 concepts.
Lesson set4 steps6 concepts
Solutions and pH Lesson Set
Use the solutions-and-pH topic route, the authored starter track, one buffer checkpoint, and the rates-and-equilibrium topic route so the broader chemistry branch stays compact and teacher-usable.
A sequenced set of 6 concepts.
Playlist4 steps6 concepts
Algorithms and Search Playlist
Use the algorithms-and-search topic route, the compact starter track, one focused graph-traversal revisit, and the filtered challenge hub so the CS branch stays bounded and extension-ready.
A sequenced set of 6 concepts.
Routes
Show subject and topic routes
Open these when you want a broader map before you choose one concept.
Routes
Show subject and topic routes
Open these when you want a broader map before you choose one concept.
Subjects
Open subject directorySubject8 topics62 concepts
Physics
Enter the current physics catalog through live motion, waves, fields, circuits, and modern-physics benches that still share one compact simulation-first product language.
Motion and Circular Motion is the clearest bounded first route.
Subject4 topics16 concepts
Math
Enter the current math slice through graph transformations, rational-function asymptotes, exponential change, vectors, complex-plane geometry, trig identities, inverse-angle reasoning, polar coordinates, and parametric motion without leaving the same live-bench product language used elsewhere on the site.
Functions and Change is the clearest bounded first route.
Subject3 topics9 concepts
Chemistry
Enter the current chemistry slice through reaction-rate ideas, a stoichiometry-and-yield recipe branch, and a broader solutions-and-pH branch without leaving the same simulation-first product architecture.
Rates and Equilibrium is the clearest bounded first route.
Subject1 topic6 concepts
Computer Science
Enter the current computer-science slice through one bounded algorithms-and-search branch where visible list work now widens into one shared graph-traversal bench without leaving the product's simulation-first architecture.
Algorithms and Search Foundations is the clearest bounded first route.
Topics
Open topic directoryTopicPhysics12 concepts
Oscillations and Waves
Follow repeating motion from one oscillator into traveling waves, sound as a longitudinal wave, pitch-versus-loudness cues, beats from nearby frequencies, Doppler shifts from motion, superposition, standing patterns, and driven resonance.
SHM is still the cleanest first concept here.
TopicMath3 concepts
Functions
Use parent-curve moves, a shifted reciprocal family, and one exponential bench so graph moves, asymptotes, domain breaks, growth versus decay, and target-time questions stay tied to the same visual branch before the math path widens into local and accumulated change.
Graph transforms is still the cleanest first concept here.
TopicChemistry2 concepts
Rates and Equilibrium
Use one compact chemistry branch where collision success explains reaction rate first, then the same particle language widens into reversible change and a new equilibrium mix.
Reaction rate is still the cleanest first concept here.
Challenges
Show challenge paths
140 challenges stay available when you want a more specific next move.
Challenges
Show challenge paths
140 challenges stay available when you want a more specific next move.
Use the challenge hub when you want a task instead of an open browse.
Open challenge hubQuestions or feedback?
Keep the first move clear, then tell us where discovery still feels noisy.
Open Model Lab stays simulation-first on purpose. If the route choices still feel crowded after the first move, send feedback and point to the page that needs another simplification pass.