Subtraction | Project Based Learning
Students will explore subtraction as an art technique by creating a collage or drawing that changes by removing shapes, colors, or parts of an image. This project-based lesson connects math and art as students represent subtraction visually through a simple mixed-media artwork.
| Term | Definition |
|---|---|
| Subtraction | The process of taking away from a group or whole. |
| Difference | The result after subtraction. |
| Collage | Artwork made by arranging and gluing different materials onto a surface. |
| Shape | A form or outline used in art. |
| Take away | Remove part of something to make it smaller. |
Show a simple picture or collage with some parts covered or removed. Ask: What changed? What was taken away? Connect student responses to subtraction.
Observe the image, share ideas, and describe what looks different after parts are removed.
Explain that subtraction means taking away. Model a quick paper collage or drawing by starting with a full shape, then cutting out or erasing one part to show change.
Watch, answer questions, and identify what was removed and what remains.
Give directions: students make a simple artwork that begins with a whole image, then subtracts parts by cutting, tearing, erasing, covering, or leaving spaces. Circulate to support and ask guiding questions.
Plan and create a collage or drawing that clearly shows something being taken away from the original design.
Invite a few students to show their artwork and explain what they subtracted and how it changed the final piece.
Present artwork and describe the subtraction process using vocabulary words.
Guide clean-up and ask students to complete a quick oral or written response: What did you subtract from your artwork? What is the difference?
Clean materials and respond to the exit question.
Review that subtraction means taking away and that artists can show subtraction by removing parts of an image or collage. Celebrate the different ways students represented change in their artwork.
Formative assessment will be based on teacher observation, student explanation during sharing, and the exit question. Assess whether students can connect the art change to the subtraction concept and use correct vocabulary.
At home, find or draw one object that can be shown with subtraction. Draw a quick before-and-after picture showing something taken away and write one sentence describing the difference.