Working with shapes
http://illuminations.nctm.org/LessonDetail.aspx?ID=L554
A lesson plan for grades 3 and 5 Mathematics
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.
Grade 5
- Goal 2: Measurement - The learner will recognize and use standard units of metric and customary measurement.
- Objective 2.02: Identify, estimate, and measure the angles of plane figures using appropriate tools.
- Goal 3: Geometry - The learner will understand and use properties and relationships of plane figures.
- Objective 3.01: Identify, define, describe, and accurately represent triangles, quadrilaterals, and other polygons.
