3rd Grade
Monta Loma Elementary School
Mountain View, California
First I gave a brief introduction to shape, and how all shapes are enclosed lines, which all have a negative space. Negative space is any space in and around a shape. I described it as "subtracting space from a shape".
We then talked about what "symmetry" means, many students knew the definition. We found the "line of symmetry" on the black pice of paper by folding it in 1/2, to use as a reference for gluing.
Then students drew a 1/2 face on a 6x9 white piece of paper. They cut out the silhouette of the face, then glued the negative space onto the right side of the black paper.
Then students continued to cut out eyes, noses, and any other small shapes they drew within their face. Those were set aside. Then their faces, with cut-out eyes, noses, etc., was glued onto the left side. (At this point, many students put the pieces together and did an "Ah HA! I understand now!" kind of gesture, and understood the next steps to complete their mirror image.