About Expression Exchange
Build coin expressions, then exchange them for variable expressions. Simplify and evaluate expressions until you are ready to test your understanding of equivalent expressions in the game!
How to play Expression Exchange
Everything is hands-on: drag, click and experiment — the simulation reacts instantly. Build coin expressions, then exchange them for variable expressions.
Questions & answers
- What is Expression Exchange?
- Expression Exchange is a free interactive simulation from PhET Interactive Simulations (University of Colorado Boulder) that you can play right in your browser on crumble.lol — no downloads and no sign-up. Build coin expressions, then exchange them for variable expressions. Simplify and evaluate expressions until you are ready to test your understanding of equivalent expressions in the game!
- What can kids learn from Expression Exchange?
- It helps kids explore: simplify expressions by combining like-terms contextualize coefficients and like/unlike-terms interpret an expression in both abstract and concrete representations build an expression that is equivalent to a target.
- What age is Expression Exchange good for?
- It is designed for elementary school (roughly ages 5–10) up to high school, and curious kids outside that range can absolutely enjoy poking around it too.
- Is Expression Exchange free to play?
- Yes — Expression Exchange is completely free on crumble.lol and runs fully in your browser on computers and tablets.