Area of parallelograms

Target: Use base times perpendicular height.

Language target: Distinguish height from a slanted side.

Likely miss: Students use a slanted side as the height.

Ask: Where is the right angle?

If you see it: Ask where the right angle of the height meets the base.

Evidence to listen for: The student multiplies base by perpendicular height.

Next: Sketch the height outside the figure if it falls outside.

Homework mark for this device

Until a teacher sets it here, family practice is optional. Stars are an incentive, not a grade. This setting is local. It is not a district roster.

unset optional required incentive

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