In the session, we introduced two models for algebra equations, discussed how each model reveals a different structure, and how each model can be used develop meaningful strategies for algebraic manipulations.
We also discussed how the models can be developed through progressive formalization of informal contexts.
Download the activity sequence for the arrow chain model
Download an activity sequence for the number line model
Extension:
A number line is also a great model for algebra equations.
Download an activity sequence for the number line model
