The purpose of this Warm-up is to elicit student knowledge about composing and decomposing composite shapes, which will be useful when students build their own composite shapes later in this lesson. While students may notice and wonder many things about this image, the idea that shapes, such as hexagons, can be composed and decomposed into other shapes—such as multiple triangles, rhombuses, trapezoids, or a combination of triangles, rhombuses, or trapezoids—is the important discussion point. Students may refer to the pattern blocks by their colors when describing them or sharing different combinations that may form the same shape. Use this as an opportunity to ask the students if they know the names of the shapes, and review shape vocabulary.

• “Algunos de ustedes se dieron cuenta de que las imágenes se parecen, pero los hexágonos están formados por figuras diferentes” // “Some of you noticed that the pictures look alike, but different shapes make up the hexagons.”
• “¿De qué otras maneras podrían armar un hexágono con las fichas geométricas?” // “What other ways could you make a hexagon with the pattern blocks?” (2 trapezoids, 1 trapezoid and 3 triangles, 2 rhombuses and 2 triangles)
• “¿De qué otras maneras podrían armar un rombo?, ¿un trapecio?” // "What other ways could you make a rhombus? a trapezoid?”

The purpose of this activity is for students to compose two-dimensional shapes into larger shapes in different ways. As students work, consider asking them to identify the shapes they are using and their attributes. During this activity, the teacher may consider taking photos of the way students composed the large triangle (third problem) and the large rectangle (fourth problem) to share during the Activity Synthesis so that students do not need to move their pattern blocks to share with the class.

The purpose of this activity is for students to compose two-dimensional shapes into composite shapes and to find other smaller shapes that can make the same composite shape. Students use pattern blocks to compose a new shape, then recreate the new shape, using smaller shapes. 

The purpose of this activity is for students to revisit Stage 3 of the Picture Books center introduced in kindergarten. Students look through picture books and notice and describe the shapes that they see. Students record the shapes they see with drawings or words.