I knew you'd have an answer!
To make the triangle, would I have them increase at both the beginning AND end each row? Just the end? Beginning and end, but every other row?
What do you recommend?
I wish I could take credit for the idea, but it came from www.woollythoughts.com
. They have a great interactive afgan generator there, where you can rearrange the triangles into a multitude of designs. My plan is to have each student submit a design and we'll vote on the one they like the best.