Solve ratio problems

Target: Find a missing quantity in a ratio situation.

Language target: State the factor before the result.

Likely miss: Students stop after finding the factor and forget to scale the other quantity, or they add the target to the ratio.

Ask: You found the factor. What still has to be scaled?

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.