Blog 9 Intro to Perimeter

 In my class last week, I introduced the concept of perimeter, and it appears that they have been enjoying this topic as a result of the many inventive and interesting hands-on activities that are available within the theme of area and perimeter.

To introduce the topic, I explained that perimeter is the distance around the outside of the shape. To calculate the perimeter of a shape all we have to do is add the length of each side of the sides. In this lesson, students will find the perimeter of figures using cheese crackers. Next, they'll design a floor plan for their cheese cracker dream house, to help them practice and retain the formula for finding perimeter.For example, if the object they measured is 3 crackers on one side, by 7 crackers on another side, the perimeter (total) would be 3 + 3 + 7 + 7, or 20 crackers.

I Started showing them how to use unit squares to count the perimeter units of a figure. For example, find an object in the classroom, such as a book, to measure. Using the cheese cracker, I modeled how students would find the perimeter of the book by placing crackers side-by-side, all around the book.

CCSS.MATH.CONTENT.3.MD.D.8 Solve real world and mathematical problems involving perimeters of polygons, including finding the perimeter given the side lengths, finding an unknown side length, and exhibiting rectangles with the same perimeter and different areas or with the same area and different perimeters.

Link: Perimeter video:

https://www.google.com/search?q=videos+about+perimeter+3rd+grade&ei=6glBYvTKJoLAa_WFpkg&oq=videos+about+perimeter+3rd&gs_lcp=Cgdnd3Mtd2l6EAEYADIICCEQFhAdEB46BwgAEEcQsAM6BggAEBYQHkoECEEYAEoECEYYAFCeA1jAJWDwMGgCcAF4AIABiAGIAcIEkgEDMC41mAEAoAEByAEIwAEB&sclient=gws-wiz#kpvalbx=_9glBYomcBNCdptQP-q-KgAU13