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Developing a Sense of Scale

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Description

Overview:
This lesson unit is intended to help you assess whether students recognize relationships of direct proportion and how well they solve problems that involve proportional reasoning. In particular, it is intended to help you identify those students who: use inappropriate additive strategies in scaling problems, which have a multiplicative structure; rely on piecemeal and inefficient strategies such as doubling, halving, and decomposition, and have not developed a single multiplier strategy for solving proportionality problems; and see multiplication as making numbers bigger, and division as making numbers smaller.
Level:
Lower Primary, Upper Primary, Middle School, High School
Grades:
Kindergarten, Grade 1, Grade 2, Grade 3, Grade 4, Grade 5, Grade 6, Grade 7, Grade 8, Grade 9, Grade 10, Grade 11, Grade 12
Material Type:
Assessment, Lesson Plan
Provider:
Shell Center for Mathematical Education, U.C. Berkeley
Provider Set:
Mathematics Assessment Project (MAP), Mathematics Assessment Project (MAP)
Date Added:
04/26/2013
License:
Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Creative Commons Attribution-NonCommercial-NoDerivs 3.0
Media Format:
Downloadable docs, Text/HTML

Comments

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Lehua HIDOE on Aug 16, 04:16pm

This is a lesson where students can investigate proportions and scale drawings. It is complete with student handouts, assessments, and lesson plans. It also includes a recommendation page for common errors. This addresses CCSS 7.RP.1 and 7.RP.2

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