This is a 3 lesson project for y8 students about area, surface area, compound shapes and nets.
We use these kinds of projects to engage our students by getting them to be creative, but also to assess them in specific skills. I explain all in the blog! http://mathematicalmagpie.blogspot.co.uk/
There is an assessment sheet with national currciulum levels taken from the national strategy APP grid.
The nets we used came from senteacher.org.
The Egg Boxes Examples powerpoint includes boxes made by top, middle and bottom set students.