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Area and Perimeter January 2013 Elementary Coaches Meeting By PresenterMedia.com •Agenda Just in time content 10 min Discussion Item One – 4th grade PARCC example 15 min Discussion Item Two – Rectangle Activity Conservation of Area 10 min Discussion Item Three – Fixed Perimeter Activity 10 min Discussion Item Four –Fixed Area Activity 10 min Discussion Item Five – Resources Do figures with the same perimeter have the same area? Do figures with the same area have the same perimeter? Questions and Answers •PARCC prototype question Add a subtitle here • This text is a placeholder. • Here is the second level. • You may change this text • Here is the third level • Formatting is controlled by the slide master and the layout pages. • An accent, click to edit the text inside. There is a third level • And even a fourth level An accent, click to edit the text inside. •Area and Perimeter A continual source of confusion AREA • Area is the two-dimension space inside a region. Data from NAEP suggest that students have an incomplete understanding. PERIMETER • Perimeter is the distance around a region. Although perimeter is a 3rd grade standard, only 71% of 8th graders accurately identified the perimeter on the NAEP assessment. Students are taught formulas without understanding. •Rectangle Activity • Fold and cut rectangle on the diagonal, making two identical triangles. Arrange the triangles into different shapes. Only sides of the same length can be matched up and must match exactly. Find all six shapes. • Does one shape have a greater area? How do you know? •Conservation of Area • Although each figure is a different shape, all the figures have the same area. • This is not an obvious concept for K-2 students. •Fixed Perimeter Do Figures with the same perimeter have the same area? • • What different sized rectangles can be made with a perimeter of 24 units? Create as many different rectangles with a perimeter of 24. • Build and label each rectangle with its perimeter and its area. • What discoveries did you make? •Fixed Area Do figures with the same area have the same perimeter? How many rectangles can be made with an area of 36 sq. units? What do all the figures with smaller perimeter have in common ? What do all the figures with large perimeter have in common? •Resources Perimeter and Area lessons Area and Perimeter Lesson http://www.teachhouston.uh.edu/TeachHouston_docu ment/lesson_plans1/Perimeter_and_Area.html 3rd Grade Unit http://mail.clevelandcountyschools.org/~ccselem/FOV1 000411E2/3rd%20Area%20%26%20Perimeter%20Unit.p df?Plugin=Loft Ten strategies to teach area and perimeter http://www.scholastic.com/teachers/topteaching/2012/12/10-hands-strategies-teaching-areaand-perimeter Questions