Grouping: Teacher demo + student observation
Take-home: Observation/data sheet or foam-print art only
Key ideas: Catalysts, reaction rate, gas production, exothermic reactions.
Start with: Run a dramatic foamy fountain and have students identify evidence of a reaction.
Success check: Students compare a controlled variable such as catalyst amount or temperature using teacher-run samples.
Try changing: Catalyst amount; temperature; container shape.
Preparation: Pre-measure all chemicals and use only a school-safe low-concentration version.
Lesson flow: Day 1: Predict → teacher runs controlled reaction(s) → students record temperature/foam height/observations → discuss catalyst
Video:
Fantastic Foamy Fountain
Safety and cleanup: Teacher handles chemicals; goggles; low-concentration peroxide only; no ingestion; wash hands and clean trays.
https://sciencebob.com/fantastic-foamy-fountain/