Grade 2MathTEKS 2.8E

Grade 2 Math TEKS 2.8E:Decompose 2D Shapes

Free, teacher-ready lessons and worksheets for Decompose 2D Shapes in Grade 2 Math, fully aligned to Texas TEKS 2.8E.

Decompose two-dimensional shapes such as cutting out a square from a rectangle, dividing a shape in half, or partitioning a rectangle into identical triangles and identify the resulting geometric parts

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      Grade 2 Math TEKS Lessons

      TEKS 2.8E: Decompose 2D Shapes

      • Decompose Two-Dimensional Shapes

        About this lesson

        Learning Target: I can decompose a shape and identify what shapes it created and if they are equal in size or not.

        Focuses On:

        • Decomposing shapes into equal parts
        • Decomposing shapes into unequal parts

        Builds On:

        1.6A

        Classify and sort regular and irregular two-dimensional shapes based on attributes using informal geometric language

        K.6E

        Classify and sort a variety of regular and irregular two-and three-dimensional figures regardless of orientation or size

        Next Level:

        3.6A

        Classify and sort two-and three-dimensional figures, including, cones, cylinders, spheres, triangular and rectangular prisms, and cubes, based on attributes using formal geometric language

        Read More:

        This lesson is designed to support student understanding of decomposing 2D shapes.


        The two instructional blocks in this lesson focus on decomposing shapes into equal parts and decomposing shapes into unequal parts.


        In the first instructional block, students learn to break a large shape into smaller, equal sized shapes.


        The second instructional block focuses on breaking a large shape into smaller, unequal sized shapes.


        Scaffolds and supports such as pictorial representations are intentionally built throughout the lesson to support conceptual learning.  

        Grade 2MathTEKS 2.8E

      Grade 2 Math TEKS Worksheets

      TEKS 2.8E: Decompose 2D Shapes

      See all 6 worksheets

      • Skill Builder: Classify and Sort Two-Dimensional Shapes

        Grade 2MathTEKS 2.8E

      • Skill Builder: Compose Two-Dimensional Shapes

        Grade 2MathTEKS 2.8E

      • Skill Builder: Decompose Two-Dimensional Shapes

        Grade 2MathTEKS 2.8E

      • Full Topic: Two-Dimensional Shapes

        Grade 2MathTEKS 2.8E

      • Decompose Two-Dimensional Shapes

        Grade 2MathTEKS 2.8E

      • Compose Two-Dimensional Shapes

        Grade 2MathTEKS 2.8E

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      Frequently Asked Questions

      How do you teach Decompose 2D Shapes to 2nd graders?

      To teach Decompose 2D Shapes to 2nd grade Math students, start with concrete, hands-on models, then move to pictorial representations before abstract notation. TEKS 2.8E asks students to decompose two-dimensional shapes such as cutting out a square from a rectangle, dividing a shape in half, or partitioning a rectangle into identical triangles and identify the resulting geometric parts. Crystal Instruction's free ClearLessons for 2.8E walk through this progression with modeling, guided practice, and built-in checks for understanding, while the ClearSheets provide scaffolded practice. You can download both free on this page.

      What is 2.8E in 2nd grade Math?

      TEKS 2.8E is a 2nd grade Math standard for Decompose 2D Shapes. It requires students to decompose two-dimensional shapes such as cutting out a square from a rectangle, dividing a shape in half, or partitioning a rectangle into identical triangles and identify the resulting geometric parts. It is part of the Texas Essential Knowledge and Skills (TEKS) for Grade 2 Math.

      Where can I find free TEKS 2.8E lessons and worksheets?

      You can download free TEKS 2.8E lessons and worksheets directly on this page — no login or account required. Crystal Instruction provides free PDF versions of our Decompose 2D Shapes ClearLessons and ClearSheets for Grade 2 Math, and each one is also available as an interactive lesson inside the full Crystal Instruction platform.

      What skills are included in 2nd grade Decompose 2D Shapes?

      TEKS 2.8E (Decompose 2D Shapes) covers the following 2nd grade Math skills: students learn to decompose two-dimensional shapes such as cutting out a square from a rectangle, dividing a shape in half, or partitioning a rectangle into identical triangles and identify the resulting geometric parts. Free resources for this standard include Decompose Two-Dimensional Shapes.

      Are TEKS 2.8E resources aligned to STAAR?

      Although Grade 2 Math is not directly tested on the Texas STAAR test, TEKS 2.8E builds the foundational skills students need for later STAAR assessments. Every Crystal Instruction ClearSheet for 2.8E is STAAR-aligned, and our ClearLessons are built to STAAR rigor using released STAAR test items, so students practice Decompose 2D Shapes at the depth STAAR expects.