Geoboards
http://illuminations.nctm.org/LessonDetail.aspx?ID=L83
A lesson plan for grades K–1 Mathematics
This lesson, one of a five-part unit from Illuminations titled “Investigating Shapes: Recognizing, Constructing, and Identifying Triangles,” students identify and recognize triangles using multiple representations, locate triangles in their environment, and construct triangles. Students use geoboards to explore the characteristics of triangles.
North Carolina Curriculum Alignment
Mathematics (2004)
Grade 1
- Goal 3: Geometry - The learner will identify, describe, draw, and build basic geometric figures.
- Objective 3.03: Compare and contrast geometric figures.
Kindergarten
- Goal 3: Geometry - The learner will explore the concepts of geometry.
- Objective 3.01: Identify, build, draw, and name triangles, rectangles, and circles; identify, build, and name spheres and cubes.
- Objective 3.02: Compare geometric shapes (identify likenesses and differences).
