This Problem Set is a part of the Lesson 13, Unit 1, Grade 6. Learning goals: Let's investigate polyhedra. Learning targets: students can describe the features of a polyhedron using mathematical vocabulary. Required Materials: nets of polyhedra scissors pre-assembled or commercially produced polyhedra tape glue or gluesticks geometry toolkits If pre-made polyhedra are unavailable, assemble some from the nets in the blackline master for the warm-up.