The Consumer Price Index Lesson Plan
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3Module: Mathematical Reasoning
Lesson Title: The Consumer Price Index: Calculating Change
Objectives and Standards
Students will:
Compute percentage of increase and decrease using information from a table.
Determine whether inflation or deflation has occurred between decades
Mathematical Reasoning
Mathematical Practices
2014 GED® Assessment Targets
2014 GED® Assessment Targets
Compute with and solve problems using rational
Make sense of problems and persevere in solving
numbers. (Q.2.a, Q.2.b)
them. (MP1)
Solve two-step, arithmetic, real-world problems that
Use appropriate tools strategically. (MP5)
involve ratios, proportions, and percents. (Q.3.c,
Q.3.d)
Attend to precision. (MP6)
Represent, display, and interpret categorical data in
Look for and make use of structure. (MP7)
bar graphs, circle graphs, dot plots, histograms, box
plots, tables, and scatter plots. (Q.6)
Materials
Computers and internet access
Calculators
Consumer Price Index (Percentages of Change) Activity Sheet
Instructional Plan
Overview
In this lesson, students calculate changes in the price level of consumer goods and services using information
from the Consumer Price Index (CPI). Students will calculate percentage of increase or decrease using a
mathematical formula and information from provided tables.
Process
Begin the lesson by asking students if they have ever heard of the Consumer Price Index (CPI). Share with
students that the CPI measures changes in the price level of consumer goods and services purchased by
households. The CPI inflation calculator uses the average Consumer Price Index for a given calendar year. This
data represents changes in prices of all goods and services purchased for consumption by urban households.
This index value has been calculated every year since 1913. For example, in 1913 something that cost $1.00
would cost $23.53 in 2013. That’s a huge increase.
Florida’s Lesson Plans for GED® Preparation
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