1. Read the following to your students: "In this video clip, a young friend of Bianca's teaches her about crystals. She learns how different crystals are made of 3-D, or three dimensional, shapes. On the handout there is a list of different shapes with a picture of each. Some are two-dimensional and some are three-dimensional. As you watch the video, circle any of the shapes you see in the crystals." (Note: You can review these shapes before playing the video clip and answer any questions students have about vocabulary, etc.)

2. Discuss the difference between two-dimensional and three-dimensional with the class by eliciting student ideas.

3. Distribute Identifying Shapes in Crystals Handout .

4. Tell the students that they will now view the video clip in which Bianca and her friend learn about crystals. Tell students to focus their attention on the 2-D and 3-D shapes they see and ask them to pay special attention to any embedded shapes they see inside of the 3-D shapes.

5. Play the Making Rock Candy QuickTime Video.

6. Discuss which shapes the students saw in the video. Ask students if they noticed the connections between 2-D and 3-D shapes.

Assessment: Level A (proficiency): Students will match a variety of shapes with the correct name of the shape.

Assessment: Level B (above proficiency): Students will cut out and fold measured shapes (also called networks) into common 3-D shapes.