Composing and Decomposing Shapes Unit of Study 11: Plane Shapes in Motion Global Concept Guide: 1 of 3

Content Development  Composing and decomposing shapes should be taught simultaneously, not in isolation ensuring that they see that there are multiple ways to do so.  Students should be given the opportunity to use pattern blocks to directly model composition and decomposition of shapes.  Students can also use the Shapes Outline and scissors to transform plane shapes.  Students do NOT need to name the transformations (reflection, rotation, translation). However, using this vocabulary is encouraged and will help them in subsequent grades.  Students not only need to identify patterns using shapes, but also identify the rules associated with each pattern.

Day 1 and Day 2  Day 1 should focus on directly modeling the composition and decomposition of plane shapes.  Students should not only use pattern blocks to model transformation.

Day 2  By the end of Day 2 students should be able to draw as well as physically model transformations of shapes.

 By Day 3 students should use diagonals to compose and decompose shapes.  Students will need to understand that a diagonal connects two vertices that are not next to each other. Day 3

Day 4  Students do not need to specifically name a pattern as repeating or growing, they only need to be able to identify that a pattern exists and be able to continue the pattern.  Students should become comfortable using tables as a tool to analyze patterns. This allows students to see the number relationship within the pattern.

Enrich/Reteach/Intervention  Reteach – Use p. R85, R88 in conjunction for students struggling with composing and decomposing shapes. Students can use manipulatives to solve these problems.  Reteach – Use p. R86 for students struggling with understanding diagonals.  Reteach – For students struggling with patterns have them create their own patterns with manipulatives and justify them.

Enrich/Reteach/Intervention  Enrich – for composing and decomposing shapes use the Enrich Activity on TE p. 417B – using tangrams to compose and decompose shapes.  Enrich – for diagonals use p. E86 – The Great Shape Divide.  Enrich – for identifying patterns use the Enrich Activity on TE p. 425B – give students numeric patterns and have them create the pattern using models.