1.6A Audience: First Grade. Behavior: Classify 2-dimensional shapes using informal geometric language. Condition: Ancho Chart. I would introduce some familiar 2D shapes and ask the students to identify how many sides and vertices using an anchor chart.
These free worksheets include two pages for students to name 2D shapes by identifying the number of sides and vertices. Shapes included: octagon, decagon, heptagon, hexagon, pentagon, circle, square (quadrilateral), and triangle. Need shape posters for word walls?
Here's a page for use with the book THE GREEDY TRIANGLE by Marilyn Burns. As the triangle changes its shape, students build each shape with marshmallows and toothpicks and record information about sides, angles, and vertices.
Geometry Nets! 6th grade Geometry 6.G 4. Represent three-dimensional figures using nets made up of rectangles and triangles, and use the nets to find the surface area of these figures. Apply these techniques in the context of solving real-world and mathematical problems. Students can make these nets and figure out the number of faces, vertices and edges.