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Assessments
ODE Assessment Item, Grade 7: Find and Use Scale Factor
Discipline
Mathematics
Grade
7
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Professional Commentary

Troy is building a pool that is proportional to an Olympic-size pool. Given the width of Troy's pool, students must find the scale factor and the length. This short-answer question is a sample item used in the 2007 Ohio Grade 7 Achievement Test (see Overview of Ohio's Assessment System). The URL link (above) takes the user directly to the OAT item (PDF), with access to performance data, complexity level of the item, a complete solution of the problem, and a scoring rubric. The Ohio Department of Education Instructional Management System website allows visitors to search for test items by subject and grade band and build a printable database of questions using the Add to Your Backpack function. ODE Reference Information: 2007 Ohio Grade 7 Achievement Test for Mathematics, Annotated Item 31. (author/sw)


Ohio Mathematics Academic Content Standards (2001)
Measurement Standard
Benchmarks (5–7)
E.
Use problem solving techniques and technology as needed to solve problems involving length, weight, perimeter, area, volume, time and temperature.
Grade Level Indicators (Grade 7)
4.
Solve problems involving proportional relationships and scale factors; e.g., scale models that require unit conversions within the same measurement system.
Principles and Standards for School Mathematics
Measurement Standard
Apply appropriate techniques, tools, and formulas to determine measurements.
Expectations (6–8)
solve problems involving scale factors, using ratio and proportion;