Median

Target: Find the median of an ordered odd-numbered list.

Language target: Say “middle after ordering.”

Likely miss: Students average the list instead of ordering it.

Ask: Did you order the list first?

If you see it: Order the values first. For an odd count, the middle one is the median.

Evidence to listen for: The student orders before choosing.

Next: If the mean appears, ask whether every value needed to be added.

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