For a grade 9 unit on the geometry of angles and lines, this was the assessment task at the end. If the student could make a shape, they would have shown me they had enough facility with the mathematics of the unit to ‘pass’ the unit.
Their choice of task allowed for differentiation; student choice also gave me insight to where they felt they were with their self-assessment of their level of achievement.
Students could, and were encouraged to, make more than one shape. All shapes made added into their cumulative record of achievement towards their final report card mark (as described in the published curriculum documentation).
This task is of my creation and design, and it is free for teachers to use or modify if you wish.