One scene, two ways
The same typed blocks draw a narrated video frame (clock) and a live explanation the learner drives (steps).
- gallery: every block with live sliders and a progress slider
- interactive: lemonade for your number (ratio table + double number line, step by step)
- player: What Is a Ratio, Really? (the whole example video, 3:54, on a 1920 × 1080 canvas; still at 146.9 s, paper theme)