![]() Again…this is a VERY valuable lesson when trying to teach missing measurement and area of irregular shapes. In the end, they realize that even if shapes have the same area, they can have a different perimeter. I require that one of the shapes by width to width and one of the shapes be length to length, and then the rest they get to configure any way they want. And it’s so easy… just whip out some index cards for groups of kids and have them find different combinations of cards to make different shapes. It hits on so much…the relationship between area and perimeter, finding missing measurements, additive area, etc. I think I originally got some version of this idea from a Mailbox Tips magazine and then have adapted it over the years to meet my needs. ![]() ![]() This index card activity is another one of my favorite activities for the older kiddos. More Perimeter and Area Practice Irregular Shapes At the end, I always ask my students to figure out how they could seat 12, 16, 24, etc. Talk about engagement! The book also has great extension activities. By the end, they are YELLING at the characters in the story trying to tell them how to arrange the chairs. I have used this lesson with kids in grades 3-5, and I’ve never had a kid NOT love it and learn something from it. There is a great free lesson at Beacon Learning ( click here) that walks you through teaching it and also provides you with a worksheet similar to my anchor chart above. The kids all have 8 tiles (the amount of tables they have) that they can manipulate as we read the story and then record it on our paper. They try several different arrangements in the hilarious story, and all along the way, we chart the seating arrangements and compare the area and perimeter. The book is all about how a family has a big spaghetti dinner and has to figure out how to seat all of the people invited with only 2 chairs. I LOVE it! We use Spaghetti and Meatballs for All by Marilyn Burns (Click the title to see my affiliate link on Amazon!). Then we did one of my all time favorite perimeter and area lessons.
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