Unit 1, Lesson 14# Fractions of Shapes, Day 3 (Fourths)

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In this lesson, students use methods from previous lessons to prove that equal parts of different shapes are equal. This lesson provides students with a variety of shapes divided into four parts, so that students can focus on proving if the parts are equal sizes regardless of their shape within identical wholes. It provides them with familiar models encountered earlier in the unit to aid in their explanations and new models that will require them to prove the equal parts can be different shapes within identical wholes as stated in the standard. While not as open as other problems in the unit, the problem still allows students to choose their methods and tools and requires them to justify their arguments.