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This lesson unit is intended to help sixth grade teachers assess how well students are able to: Analyze a realistic situation mathematically; construct sight lines to decide which areas of a room are visible or hidden from a camera; find and compare areas of triangles and quadrilaterals; and calculate and compare percentages and/or fractions of areas.
Geometry, Ratios and Proportions
Lower Primary, Upper Primary, Middle School, High School
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
Shell Center for Mathematical Education
Provider Set:
Mathematics Assessment Project (MAP)
Date Added:
Creative Commons Attribution Non-Commercial No Derivatives
Media Format:
Downloadable docs, Text/HTML


Anonymous on Aug 09, 02:39am

Optimizing Security Cameras can be used as a formative assessment task to build students conceptual understanding ratio reasoning to solve problems and solving real-world problems involving area. The security camera task requires students to make sense of problems while reasoning abstractly. Students use models and construct sight lines to determine which areas of the store are visible to the camera.

The task identifies potential student misconceptions and offers strategies to address student understanding.



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