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Area Code Mathematics
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Subject: | Arithmetic, Geography
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Grade: | 3-5, 6-8, 9-12
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Brief Description
Kids solve math problems built from an area code map from a local phone book.
Objectives
Students solve grade-appropriate math problems (for example, three-digit addition, subtraction, or multiplication) using the telephone area codes supplied on a U.S. area code map.
Keywords
telephone, map, addition, subtraction, multiplication
Materials Needed
- computers with Internet access
- copies of area code maps or a transparency of an area code map and an overhead projector (area code maps are available in phone directories)
- online resources, including Area Codes Map and LincMad's 2003 Area Code Map)
- teacher-created, grade-appropriate math problems (either on work sheets or ready for you to read aloud)
- paper
- pens or pencils
Lesson Plan
Provide students with access to a telephone area code map. Hand out work sheets with simple problems for students to solve, or call out math problems for individuals or groups to solve. For example,
- Grade 2 and up: What is the total of Idaho and North Dakota? (This problem requires no carrying: 208 + 701 = 909)
- Grade 3 and up: What is the total of western Nebraska and southwestern Kansas? (This problem requires simple carrying: 308 + 316 = 642)
- Grade 4 and up: What is the total of Alabama? (256 + 205 + 334 + 251 = 1,046)
- Grade 5 and up: What is the difference between western Colorado and northernmost Arizona? (970 - 928 = 42)
- Grade 6 and up: Which state multiplied times 2 equals Vermont? (Vermont is area code 802; Rhode Island is area code 401. 401 x 2 = 802)
Assessment
Students correctly solve 75 percent of the problems.
Lesson Plan Source
Education World
Submitted By
Gary Hopkins
National Standards
Mathematics:
NM.K-4.1
NM.K-4.7
NM.5-8.1
NM.5-8.7
NM.9-12.1
NM.9-12.5
Geography:
NSS.G.K-12.1
Originally published 08/31/2001
Links last updated 10/02/2007
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