Starting in November, we begin making our putz glitter houses. I begin this after receiving permission forms from parents to use the x-acto knifes. After I receive these, I go over basic techniques with the students of how to score the cardboard for folds, proper angling of blade, and other safety tips. First students create a paper form for their houses to make sure it will all fit together. This teaches them symmetry because they have to make 2 of every side in order to make the house sit correctly. It also teaches them the importance of angles so that the house sit correctly.
Using the internet for ideas is a key in the beginning. You can also find patterns for beginning your house online. Reference is ideal for inspiration.