| Susan Osborne |
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Introduction
The student will compute the perimeter, area, surface area, and volume of five storage boxes. The information will be put on a spread sheet and the student will be asked to explain any patterns he or she can see. The student will build three-dimensional figures to show the storage boxes.
Subject: Math
Topic: Geometry
Grade Level: 7
WHAT IS HAPPENING?
Standards Addressed
2.3 Compute the length of the perimeter, the surface area of the faces, and the volume of a three-
dimensional object built from rectangular solids. Understand that when the lengths of all dimensions are multiplied by a scale factor, the surface area is multiplied by the square of the scale factor and the volume is multiplied by the cube of the scale factor.
Instructional Objectives
Students will be given the web site, http://forum.swarthmore.edu/dr.math/ to look up vocabulary.
Students will use a spread sheet to enter data from the set of five rectangular solids.
Students will find that the increase in the rectangular solids will be in terms of scale factors and exponents.
The students will complete three activities. The
Introductory Activity is a pretest.
If the student needs a review of terms, he
or she can use the website. The Enabling activity
is the story problem. The student will draw these rectangular solids
and complete a spread sheet with computations from the story problem.
The Culminating activity is an activity to construct the set of rectangular
solids to use to compare scale factor
Introductory Activity
The students take a pretest and from the results of the pretest, the teacher will determine if the student needs to review terms. If they are ready to go on to the story problem they can.
Enabling
Activity(ies)
The students will read and
evaluate a story problem about making five storage boxes in shop class.
The main activity is solving
the problem of determining the perimeter, surface and volume of the storage
boxes. The work will be entered on a spread sheet that each student
should have. The student will do all the calculations.
The students may have to do
a review of exponents.
Culminating
Activity
The standard is about using
the scale factor. The students will determine the increase
in the size of the boxes in terms of a scale factor. They will
use a worksheet, look for patterns, and make a conclusion.
The students will be graded on their projects and the final test.
back to the top
These are the results from my class. After drawing the boxes using
isometric paper and
making the models, the test did show a satisfying result. We
did review exponents.
Web
Resources & Supplementary Materials
Burney
Junior Senior High School
Burney,
CA
skosborne@hotmail
Last Revised:
04/26/01