Understand rates

Target: Describe a rate as a comparison of two different units.

Language target: Include both units in the sentence.

Likely miss: Students divide in the wrong order or add the two units.

Ask: What two units are being compared?

If you see it: Have the student underline both products and name the shared factor before computing.

Evidence to listen for: Both cells in a new row come from the same factor.

Next: Return to a double number line if addition appears. Otherwise compare two ratios.

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