Lesson plan

Use percent error to determine the accuracy of an estimated value to the exact value

teaches Common Core State Standards CCSS.Math.Content.7.EE.B.3 http://corestandards.org/Math/Content/7/EE/B/3
teaches Common Core State Standards CCSS.Math.Content.7.RP.A.3 http://corestandards.org/Math/Content/7/RP/A/3
teaches Common Core State Standards CCSS.Math.Practice.MP1 http://corestandards.org/Math/Practice/MP1
teaches Common Core State Standards CCSS.Math.Practice.MP2 http://corestandards.org/Math/Practice/MP2
teaches Common Core State Standards CCSS.Math.Practice.MP4 http://corestandards.org/Math/Practice/MP4

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Big Ideas: Percent error is a comparison where the part-to-whole relationship is between the quantity of error (part) and the exact value (whole). A percent is another way to write a decimal or fraction that compares part to whole where the whole is 100 and can be associated with the corresponding point on the number line. In this task, students will analyze an estimation problem for percent error. Students will apply their knowledge of part to whole relationships in a new situation in which the ‘part’ is the error between an approximation and an exact value. They will be able to determine percent error using a bar model or an equation. Vocabulary: percent error Special Materials: Calculator as needed.