Chemistry
Everything is made of something — chemistry is the story of what, and how it changes. Teach it to prove you've got it.
🔬 LAB · PLAY, THEN TEACH IT
States of Matter
Heat and cool the atoms — watch solid, liquid and gas switch in real time.
Opens in a new tab · a hands-on lab from PhET · University of Colorado Boulder. Play with it, then come back and teach it to your AI student.
What you'll teach · pick a grade
5 knowledge points in Grade 3
Melting and FreezingHeating turns a solid into a liquid and cooling turns it back — and it's the same material the whole time.Teach it →Evaporation and CondensationWhere puddles go on a sunny day and why cold cups get wet — liquids turning to gas and back again.Teach it →Changes You Can UndoSome changes are reversible, like melting an ice cube, because you can get exactly what you started with.Teach it →Changes You Can't UndoBaking a cake or burning paper makes something new that can never be turned back — an irreversible change.Teach it →The Flow of HeatHeat always travels from warmer things to cooler things, which is why ice cream melts in your hand.Teach it →
The road ahead · grade ladder
Pick a grade · difficulty climbs 1 → 12
Chemistry across the grades
Grade 6Middle school
Atoms & elements · the periodic table, introduced