Working with shapes
http://illuminations.nctm.org/LessonDetail.aspx?ID=L554
A lesson plan for grades 3–4 Mathematics
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Students review basic geometric terms related to triangles. They explore these terms and other geometric concepts by modeling them on the geoboard. Illuminations provides a link to the virtual geoboard, graphic organizers, and detailed instructions for completing the lesson.
Students will:
- Use geometric vocabulary.
- Identify, compare, and analyze characteristics of geometric shapes.
- Recognize acute, obtuse, and right angles.
NCTM Standards and Expectations:
- Describe location and movement using common language and geometric vocabulary.
- Build and draw geometric objects.
- Create and describe mental images of objects, patterns, and paths.
- Recognize geometric ideas and relationships and apply them to other disciplines and to problems that arise in the classroom or in everyday life.
North Carolina Curriculum Alignment
Mathematics (2004)
Grade 3
- Goal 3: Geometry - The learner will recognize and use basic geometric properties of two- and three-dimensional figures.
- Objective 3.01: Use appropriate vocabulary to compare, describe, and classify two- and three-dimensional figures.
- Objective 3.02: Use a rectangular coordinate system to solve problems.
- Graph and identify points with whole number and/or letter coordinates.
- Describe the path between given points on the plane.
Grade 4
- Goal 3: Geometry - The learner will recognize and use geometric properties and relationships.
- Objective 3.01: Use the coordinate system to describe the location and relative position of points and draw figures in the first quadrant.
