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# Massachusetts Comprehensive Assessment System

 Question 13: Open-Response Reporting Category: GeometryStandard: Mathematics.3.G.1.02 - Partition shapes into parts with equal areas. Express the area of each part as a unit fraction of the whole. For example, partition a shape into 4 parts with equal area, and describe the area of each part as 1/4 of the area of the shape. Use your MCAS ruler to answer question 13.A rectangle is shown below.Draw line segments on the rectangle to divide the rectangle into 8 equal parts.What fraction of the area of the whole rectangle is the area of each part?

### Scoring Guide and Sample Student WorkSelect a score point in the table below to view the sample student response.

ScoreDescription
2 The student response demonstrates an exemplary understanding of the Geometry concepts involved in partitioning shapes into parts with equal areas and expressing the area of each part as a unit fraction of the whole. The student divides a rectangle into equal parts and writes a fraction to represent the area of one part.
2
1 The student response demonstrates a fair understanding of the Geometry concepts involved in partitioning shapes into parts with equal areas and expressing the area of each part as a unit fraction of the whole. While some aspects of the task are completed correctly, others are not. The mixed evidence provided by the student merits 1 point.
0 The student response contains insufficient evidence of an understanding of the Geometry concepts involved in partitioning shapes into parts with equal areas and expressing the area of each part as a unit fraction of the whole to merit any points.

Note: There are 2 sample student responses for Score Point 2.