Lesson plan

Lego Pad: Trajectory of Understanding

teaches Common Core State Standards CCSS.Math.Content.2.G.A.2 http://corestandards.org/Math/Content/2/G/A/2
teaches Common Core State Standards CCSS.Math.Content.2.OA.C.4 http://corestandards.org/Math/Content/2/OA/C/4
teaches Common Core State Standards CCSS.Math.Practice.MP4 http://corestandards.org/Math/Practice/MP4
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7
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Students will understand that to find the total number of square units needed to cover a rectangle, a rectangle can be partitioned into rows and columns with equal-sized square units. Repeated addition can be used to find the total sum of the rows and columns. The suggested public discussion of student work shows a trajectory of understanding. Discussing this work publicly is important because it builds upon students' work with partitioning shapes and repeated addition. In this lesson, students will design helicopter pads using square tiles. Students will get more practice partitioning numbers in different ways when they create rectangular arrays. This lesson builds towards students' future work with multiplication. Four pieces of work are shown. The first and the second work samples show two different misunderstandings of the idea of what a rectangular array is and how to use repeated addition. The third work sample shows the student's understanding of rectangular arrays and how to partition them, but the student had some misunderstanding of repeated addition. The fourth work shows the student's thorough comprehension of the concepts. This Student Work Discussion Plan was created by a member of the 2015 Delaware Dream Team. Special Materials: Square tiles