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