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Track recap

Compact review built from the authored track order and the same local-first concept progress already saved in this browser.

Full trackRecap mode
Track recap9 concepts2 checkpoints230 min0 revisit cues

Waves

Not started

Use oscillation as the entry point, lock down wave speed and wavelength, carry that into longitudinal sound and pitch-versus-loudness cues, add beats as the nearby-frequency superposition bridge, then move into Doppler shifts, interference, standing-wave patterns, and open-vs-closed air-column resonance without losing the live connection between motion and graph.

Recap mode stays available, but it becomes useful after you save some local progress in the track.

Oscillation linkSpeed and wavelengthLongitudinal soundPitch vs loudnessBeatsDoppler shiftInterferenceStanding patternsOpen vs closed pipes

How it works

Same authored sequence, lighter revisit.

Recap mode does not invent a second curriculum. It keeps the existing starter-track order, then changes the prompt and suggested action with the current mastery and progress signals.

Keep using concept pages

Quick tests, challenge mode, worked examples, and read-next stay where they already live.

Recap links only jump you to the most useful surface for a fast review. The simulation-first concept pages still carry the real teaching work and keep the guided path intact.

Recap steps

Revisit the track in the same authored order.

Focus badges and button targets come from the current mastery and progress signals. The next ready checkpoint still stays in the loop.

  1. 1Not startedMastery: NewNext guided step

    Simple Harmonic Motion

    Simple Harmonic Motion is still the next guided step in this authored order. No finished quick test, solved challenge, or completion mark is saved yet.

    Start here before moving into Wave Speed and Wavelength.

    AmplitudePhase25 min
    Open next step
  2. 2Not startedMastery: NewAhead

    Wave Speed and Wavelength

    This concept stays in the recap because it completes the authored track story, even if you have not reached it on this browser yet.

    Builds on Simple Harmonic Motion before setting up Sound Waves and Longitudinal Motion.

    v = f lambdaTravel delay25 min
    Preview concept
  3. 3Not startedMastery: NewAhead

    Sound Waves and Longitudinal Motion

    This concept stays in the recap because it completes the authored track story, even if you have not reached it on this browser yet.

    Builds on Wave Speed and Wavelength before setting up Pitch, Frequency, and Loudness / Intensity.

    Compression and rarefactionParticle vs wave motion25 min
    Preview concept
  4. 4Not startedMastery: NewAhead

    Pitch, Frequency, and Loudness / Intensity

    This concept stays in the recap because it completes the authored track story, even if you have not reached it on this browser yet.

    Builds on Sound Waves and Longitudinal Motion before setting up Beats.

    Pitch from frequencyLoudness from amplitude20 min
    Preview concept
  5. 5Not startedMastery: NewAhead

    Beats

    This concept stays in the recap because it completes the authored track story, even if you have not reached it on this browser yet.

    Builds on Pitch, Frequency, and Loudness / Intensity before setting up Doppler Effect.

    Amplitude envelopeBeat frequency20 min
    Preview concept
  6. 6Not startedMastery: NewAhead

    Doppler Effect

    This concept stays in the recap because it completes the authored track story, even if you have not reached it on this browser yet.

    Builds on Beats before setting up Wave Interference.

    Compressed wavefrontsMoving observer25 min
    Preview concept
  7. 7Not startedMastery: NewAhead

    Wave Interference

    This concept stays in the recap because it completes the authored track story, even if you have not reached it on this browser yet.

    Builds on Doppler Effect before setting up Standing Waves.

    Constructive interferenceDestructive interference30 min
    Preview concept
  8. 8Not startedMastery: NewAhead

    Standing Waves

    This concept stays in the recap because it completes the authored track story, even if you have not reached it on this browser yet.

    Builds on Wave Interference before setting up Resonance in Air Columns / Open and Closed Pipes.

    NodesAntinodes30 min
    Preview concept