Track recap
Compact review built from the authored track order and the same local-first concept progress already saved in this browser.
Stay on the sound branch long enough that longitudinal motion, pitch-versus-loudness cues, beats, Doppler shifts, and open-vs-closed air-column resonance feel like one acoustics path instead of isolated pages.
Recap mode stays available, but it becomes useful after you save some local progress in the track.
How it works
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
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
Focus badges and button targets come from the current mastery and progress signals. The next ready checkpoint still stays in the loop.
Sound Waves and Longitudinal 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 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.
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.
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 Resonance in Air Columns / Open and Closed Pipes.
This concept stays in the recap because it completes the authored track story, even if you have not reached it on this browser yet.
Capstone step after Doppler Effect.