Area and PerimeterJanuary 2013

Elementary Coaches Meeting

By PresenterMedia.com

•AgendaJust in time content

Discussion Item One – 4th grade PARCC example

Discussion Item Two – Rectangle ActivityConservation of Area

Discussion Item Four –Fixed Area ActivityDo figures with the same area have the same perimeter?

Discussion Item Five – ResourcesQuestions and Answers

10 min

15 min

10 min

10 min

10 min

Discussion Item Three – Fixed Perimeter ActivityDo figures with the same perimeter have the same area?

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Add a subtitle here•PARCC prototype question

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AREA• Area is the two-dimension space

inside a region. Data from NAEP suggest that students have an incomplete understanding.

• 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.

PERIMETER

•Area and PerimeterA continual source of confusion

• 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?

•Rectangle Activity

• Although each figure is a different shape, all the figures have the same area.

• This is not an obvious concept for K-2 students.

•Conservation of 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 PerimeterDo Figures with the same perimeter have the same area?

How many

rectangles can be

made with an area of

36 sq. units?

•Fixed AreaDo figures with the same area have the same perimeter?

What do all the figures with smaller perimeter have in common ?

What do all the figures withlarge perimeter have in common?

•ResourcesPerimeter and Area lessons

Area and Perimeter Lessonhttp://www.teachhouston.uh.edu/TeachHouston_document/lesson_plans1/Perimeter_and_Area.html

3rd Grade Unithttp://mail.clevelandcountyschools.org/~ccselem/FOV1-000411E2/3rd%20Area%20%26%20Perimeter%20Unit.pdf?Plugin=Loft

Ten strategies to teach area and perimeterhttp://www.scholastic.com/teachers/top-teaching/2012/12/10-hands-strategies-teaching-area-and-perimeter

Questions