The Knobless Cylinders are the final stage in the dimensional material where the child, based upon his ability to discriminate, places the individual sets of cylinders in the...
Sight is a complex function of the brain that extends from the front to the back of the head. The last part of the brain involved in sight is the visual cortex, where sensory...
A 31 in x 31 in. matrix, displaying height and width. Used with the knobbless cylinders to help children understand patterns and relationships. Matrix printed on vinyl, while...