1. Compose Two- Dimensional Shapes Unit of Study: Two-Dimensional Geometry Global Concept Guide: 2 of 4

2. Content Development  An effective way to teach composing two-dimensional shapes is to let students explore and experiment. Give students the opportunity to use manipulatives such as pattern blocks and tangrams each day.  As students combine shapes, have them record their findings and look for relationships among shapes.

3. Content Development  Some students may not understand that shapes may need to be turned over and around to make a new shape. Students may not yet understand that the position of the shape does not define the shape. Help students understand that a shape is the same despite its orientation.  Real World Connection: Have students consider careers that may need to compose shapes. For example, Architects must be able to put together shapes in order to create plans for buildings.

4. Day 1  The first day of Composing Two-Dimensional Shapes should be used for basic hands-on exploration of combining two dimensional shapes with various manipulatives. Have students record their findings in a journal.  Go Math Lesson 12.3 can be used to help facilitate student exploration. Make sure students have the pattern blocks in addition to the book.

5. Day 2  The Voyages Gr. 1 Excursions Lesson: Making PicturesMaking Pictures Student Activities: Picture, Picture, Where is the Picture? (Excursions SE p. 77, 79) Build a Picture (Excursions SE, p. 80)Picture, Picture, Where is the Picture?Build a Picture will help continue student exploration of composing 2D shapes.  Portions of Go Math Lesson 12.4 can also be used to strengthen understanding.  Students should still be using concrete manipulatives on day 2, younger children do not have the spatial reasoning necessary to mentally visualize the combinations they are making.

6. Day 3  Portions of Go Math Lesson 12.5, along with pattern blocks, can be used to continue developing student understanding of composing 2D shapes  Encourage students to compare their newly composed shapes to objects in the real world  By day 3, students should be able to draw representations of their combined shapes and encouraged to combine shapes by drawing pictures without using manipulatives first.  Students could explore composing 2D shapes on the computer with the Illumination activities listed in the GCG

7. Enrich/Reteach/Intervention Enrich:  An quick way to Enrich when composing 2D shapes is to challenge the student to create a specific shape or 2D figure  Go Math Grade 1Enrich 12.5 (p. E95) Intervention/Small Group:  Go Math Grade 1 Reteach 12.3 (p. R93)  Go Math Grade One Tier 2 (TE 493B) could be used as a small group activity

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