Find the percent

Target: Find what percent a part is of a whole.

Language target: Use “part” and “whole” correctly.

Likely miss: Students divide the whole by the part, or treat the percent as an amount to add or subtract.

Ask: Which number is the whole?

If you see it: Ask: which number is the whole? Shade a 10 by 10 grid before calculating.

Evidence to listen for: The student names the whole, the part, and the percent, and the calculation matches that story.

Next: If part and whole are swapped, stay with the grid. If the relationship is stable, use a new whole.

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