Objectives:
1. Identify different types of optical illusions.
2. Use line and color to create an optical illusion.
3. Recognize the use of color in optical illusion images.
4. Evaluate the use of color in student work.
Materials Provided:
• Paper, 9”x12” and 9”x24”
• Crayons or Markers
• Paper Cutter
• Ruler
• Glue Sticks
Materials Needed:
• Pencil
Vocabulary:
1. Optical Illusion- visually perceived images that differ from objective reality
Motivation:
1. Show and discuss examples of optical illusion.
2. Demonstrate all steps of the procedure before students begin.
3. Show students the finished product illustrating the contrast in colors from the two drawings.
Instruction: 1. Make two drawings on separate pieces of paper. Try making drawings that are opposites (day/night, summer/winter) to help create a better result. Light colors on one drawing and dark colors on the other will also create the best results for the illusion.
2. Flip the first drawing over and measure 1” marks along the top and bottom of the paper, connect the two marks with a ruler to make 1” strips. Number each 1” section on the back of the paper starting from the left with number 12 and moving to the right ending with number 1 (numbering will be backwards).
3. Flip over the second drawing and measure the same 1” marks along the top and bottom of the drawing, connect the marks to make the same 1” sections. Number the sections on the back of the paper starting from left with number 12 and the letter A (12A) and move to the right ending with 1A.
4. A teacher or adult should use the paper cutter to cut out the 1” numbered strips for both drawings created. (12 strips for each drawing, 24 in total)
5. Glue the strips of drawings to the 9’x24” thick paper provided (colored side up). Alternate the numbered strips so that the strips of the first drawing are next to strips from the second drawing. (1, 1A, 2, 2A….)
6. Fold the 9”x24” paper like an accordion using the 1” strips as guides to fold against. There should be folds at
the edge of every 1” strip. (Try using a table for straight edges).
7. The two drawings should be visible but jumbled if looking straight-forward at the folded paper. Looking from either the right side or left side should clearly reveal one individual drawing while hiding the other creating the illusion of two different pictures when looking from two different sides.
Evaluation:
1. Use color to create an illusion in the project?
2. Use correct techniques to carefully produce clean borders and crisp-edged lines?
3. Evaluate completed work?
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