Evaluate expressions

Target: Substitute a value into parentheses before multiplying.

Language target: Read the parentheses as one value.

Likely miss: Students multiply the coefficient only by the variable and then add, ignoring parentheses.

Ask: What was inside the parentheses after you substituted?

If you see it: Substitute into the parentheses before multiplying.

Evidence to listen for: The student can show both the substituted parentheses and the product.

Next: If the parentheses are dropped, return to one numerical example.

Observable student moves: names both quantities, uses the represented relationship, and revises after feedback. This companion is not a score.