Monster symmetry

Students will make a "monster" through symmetry using white paper, pencils, and scissors. This activity will help students visualize how to identify objects that can be divided symmetrically.

A lesson plan for grade 3 Mathematics

By Mary Allen

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Related topics

• Learn more about geometry, hands-on, mathematics, and symmetry.

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Learning outcomes

Students will understand how objects are divided symmetrically by creating their own symmetrical drawing.

Teacher planning

Time required for lesson

45 minutes

Materials/resources

• white copy paper
• assorted construction paper size 9″ x 12″
• glue
• markers
• scissors
• pencils

Pre-activities

Students will need to be introduced to symmetry and understand perimeter.

Activities

1. Teacher will have students identify objects in the classroom that has a line of symmetry. After the students are comfortable identifying, then the teacher will have students fold their white paper in half length wise (like a hot dog bun). Students need to be reminded to draw on the folded edge.
2. Then the teacher will demonstrate how to write letters in block or bubble style making sure that all of the letters are attached to one another and to the fold. The students will write their name on the white paper on the fold in either bubble or block letters. (Each letter should be 1″ to 3″ high.)
3. After the students have completed their name, they should cut out the name around the perimeter of the letters. (Do not cut out each letter individually and do not cut out on the fold where the letter meets the fold!) The students will then open up their name and it should be connected and symmetrical. Each student will glue his name onto a piece of colored construction. The name needs to be open.
4. With a marker, students can draw eyes, arms, legs, or tails on the creature they have created with their symmetrical names. (see Example 1 and Example 2)

Assessment

Students must identify the line of symmetry in each picture created as a group assessment. Each project will be assessed based on successful completion.

Supplemental information

Comments

This lesson can be completed in fourth grade as a review of symmetry. It is a great Halloween activity.