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Thank you for your interest in my products! I hope you enjoy this free product so you can get a general idea of how I create SmartBoard lessons. Many of my products included cooperative learning techniques and current educational practices (SEI or GRR) that are being used. If you ever have a question about these, please ask!
This is a very thorough SmartBoard lesson on changing attributes (length or width) of rectangles and how it affects the area or perimeter. Students begin finding the area/perimeter of the original shape and then use that to find the change when one of the attributes increases or decreases.
This lesson has 20 slides, which include: An anticipatory set, objectives, rationale, vocabulary, direct instruction, check for understanding, (many) practice problems, and a closure.