One of my favorite activities to do in Algebra II and PreCalculus. This is an investigation into Pascal's Triangle and all the fun patterns to be found in there. I would quickly intro it and how to create the triangle and then let them work. It easily will take them a block (90 minutes) to work on it.
I was a high school math teacher for five years and am now an elementary technology facilitator. I love my jobs and couldn't be more happy to share my passions.