Lesson objective: Name and describe shapes, including cubes and spheres, based on their defining attributes.

This lesson helps to build procedural skills with naming shapes based on their defining attributes. Images of cubes and spheres are used here because their defining attributes of faces, edges, and vertices can be easily highlighted and labeled. This work develops students' understanding that shapes are named based on their defining attributes.

Students engage in Mathematical Practice #2 (Reason abstractly and quantitatively) as they visualize defining attributes through visual images, animations and labels that will help them name and describe solid shapes.

**Key vocabulary:**

- cube
- edges
- faces
- solid shapes
- sphere

Vocabulary Suggestions:

- You may further define solid shapes as 3D shapes, or shapes that have three dimensions, length, width, and depth.
- The video uses the vocabulary of "corners" for solid shapes. You may introduce the word "vertices" in addition to "corners" during discussion.

**Special materials needed:**

- brown paper bags
- Exit Ticket Shapes (located in Additional materials), paper bag
- solid shapes: cube, sphere, square, circle, triangle, rectangle, and hexagon (if available)