So often students confuse when to use the formula A=bh and A=1/2bh. This is the perfect activity with endless options to help solidify that distinction. This one page match can be done individually, in partners, as an assessment, or even as a memory game (find two cards that have the same area). Students can cut the cards apart and then find the rectangle, triangle, and parallelogram with the same area. At the end, they should have 3 in each column, which will help them know if they did it correctly. Great activity with excellent self-checking added in as well.