Assignment time can sometimes be boring for a teacher, especially when kids are beavering away independently:

This is a tessellation I have not tried before. Based on a square grid, diagonal squares rotate 45 degrees to lie flat again, causing pleat ripples that are cancelled out by adjacent twists – clever.

The scale of this was a slight miscalculation, my fat, clumsy fingers struggled from the first collapse, but the end result is nice and crisp and pretty precise. This tessellation, like most, eats paper. This fold was started on a full sheet of A3, the final fold is smaller than A4.

Originally I needed this tessellation to perform a different tessellation, so it will re-surface as another model.