Anytime I make materials for the classroom, I make sure keep consistency. For example, these beautifully illustrated cards come with convenient cutting lines where I am sure to cut on the inside - that way, there is no risk for the black line to appear on the cards themselves. Also, I took time to measure and cut black card stock to mount the cards onto. I think this gives the material a finished look and adds a certain depth to the photos. For control of error, I used color-coded dot stickers on the back of the cards. For example, the cards with a picture of a sphere had a red dot as did its three corresponding photos.
During the lesson, I first re-introduced the names of the solids. Then, I introduced the the matching Geometric Solid cards and the child matched the cards to the shape as seen in this photo:
Once the child was successful with the first set of pictures, I then invited them to sort the remaining photos underneath:
|Sorting in progress|
|Control of Error - matching dots on the backs of cards underneath each Geometric Solid.|