June 2005 Navigating through Measurement in Grades 3 – 5, NCTM, 2005
1All students should… explore what happens to measurementsof a two-dimensional shape such as its perimeter and areawhen the shape is changed in some way.”“Changing Garden”Grades 4-5GOALS? Calculate the perimeter of a rectangle ? Understand that for one given perimeter, many different areas arepossible.
(Garden fences keep out animals that eat plants.
Spend a few moments finding classroom objects with two-dimensional shapes
that have noncurved sides.
Work with an overhead projector and a transparency of the
blackline master or draw a repli...
Allowed
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