Finding the shape that results from cutting a three-dimensional shape is a fun topic. Students really enjoy this topic. When you look for ideas for teaching this topic, you’ll inevitably find an introductory activity using play-doh. Students make the 3-D shapes out of play-doh and then cut them with a string of some sort. But there’s other ways to help students see and understand this topic, so I’m sharing 12 other activities today (but you can see some different versions of this play-doh activity here and here). [Read more…] about 12 Activities to Practice Cross Sections of 3D Shapes Like a Ninja