I was spending hours reminiscing and looking through old photos when I came across these few photos that I had taken of a lesson on perimeter of irregular shapes. I remembered how much I loved it, and I wanted to share it with you quickly here! It's so easy, and the perfect introduction to the concept.
If you don't have a class set of pentominoes, you can print out a set from Scholastic HERE. This version includes square units, which would be great for differentiation, too. Otherwise, I would recommend a plastic class set of them from Amazon or the teacher store because they are wonderful and have many applications!
And a little disclaimer before I post the lesson… have mercy on my poor quality pictures! These were taken on the fly before I erased it for the next topic. 😉
Before they left, they had to answer the question above as an exit ticket. I wish I had taken pictures of some of their answers, because they were wonderful!
Not only was this a great lesson, but when I do it again, I will do it as part of their interactive notebook and make the exit ticket their reflection piece at the end. This would have been very valuable for them to refer back to!