I think this lesson went really well. I liked how everybody had an opportunity to be involved which is quite rare. Even my very low students, were able to count the perimeter because they can count to 20. Using their physical bodies kept them engaged, and the students who weren't actively counting etc were still able to participate by being part of the area. I really liked watching them work together and figure it out together, with little or no teacher direction. I only stepped in when they really got stuck, or if somebody had a genius thought I wanted to point out.
By the end of the lesson, all the students were able to understand which one I was talking about if I said 'make me a shape with a area/perimeter of'. They were able to tell me which was the inside and outside, and how to figure out each one.
I'd love some critical feedback on this lesson.
Please leave me a comment on something you think I did well, and something I can work on.