## What a Shape!

### Dian HooperOrange County Schools

#### Description

This interactive, cooperative, culminating activity is designed to apply a second grade student's knowledge of mathematical descriptor terms about 2 and 3 dimensional shapes to describing attributes of 2 and 3 dimensional real world items.

#### Objectives

The student describes attributes of two-dimensional shapes using mathematical language (for example, curves, edges, vertices, angles).

The student describes attributes of three-dimensional shapes using mathematical language (for example, curves, vertices, edges, faces, angles).

The student sorts two- and three-dimensional figures according to their attributes.

The student knows the names of two-dimensional and three-dimensional figures presented in various orientations in the environment.

#### Materials

1. Collect a variety of small, common items representing the different shapes (triangle, circle, square, oval, rectangle, octagon, trapezoid, rectangular prism, cube, cylinder, cone, sphere and pyramid) learned in previous lessons
2. Place 6 items in a large Ziploc Bags
3. Set out appropriate number of poster sized class graphic organizer for students to use for classifying (such as a tree map from the Thinking Maps program) Each group should have one graphic organizer.

#### Preparations

1. Collect a variety of small, common items representing the different shapes (triangle, circle, square, oval, rectangle, octagon, trapezoid, rectangular prism, cube, cylinder, cone, sphere and pyramid) learned in previous lessons
2. Place 6 items in a large Ziploc Bags
3. Set out appropriate number of poster sized class tree maps (each group should have one)

#### Procedures

1. This is a culminating activity to apply knowledge of mathematical descriptor terms (for example: curves, lines, vertices, angles) about 2 and 3 dimensional shapes (for example: triangle, circle, square, oval, rectangle, octagon, trapezoid, rectangular prism, cube, cylinder, cone, sphere and pyramid) in describing attributes of 2 and 3 dimensional real world items.

2. Students review prior knowledge by revisiting graphic organizers used to define and describe shapes(such as Circle and Bubble Maps from the Thinking Maps program) about each shape (for example: triangle, circle, square, oval, rectangle, octagon, trapezoid, rectangular prism, cube, cylinder, cone, sphere and pyramid) using mathematical terms (for example: curves, lines, vertices, angles).

3. Teacher gives directions for the activity; 1. Students to discuss each item’s shape and then sort by 2 or 3 dimensional shapes, 2. Give a presentation to the class explaining how the items were sorted using the mathematical terms reviewed.

4. Students are paired up as partners.

5. Prepared materials are distributed.

6. Students sort a bag of assigned items into categories (2 dimensional or 3 dimensional) on a preprinted poster sized graphic organizers used for classifying (such as a tree map from the Thinking Maps Program). Students have an ongoing dialog justifying the placement of each item in the particular category.

7. Students informally conference with teacher as the teacher circulates the room asking guiding questions “How do you know the "(name specific item)" belongs here?”

8. Students leave the items on the tree map for presentation to class.

9. Students give a presentation to the class explaining in mathematical terms the justification of each item.

#### Assessments

Students work cooperatively in pairs to sort 6 randomly selected dimensional items into 2 categories on a graphic organizer; 2-dimensional and 3-dimensional objects and then give an oral presentation using mathematical language to justify placement of the objects in the specific categories.

The teacher circulates to observe the sorting process and listen to the dialog of the cooperative groups providing feedback and asking guiding “tell me how you know” questions. The student explanations serve as formative assessment to determine accuracy of information prior to presentation.

#### Extensions

Students write a detailed description about the results found on the graphic organizer using mathematical terms to describe the items.