ETC pioneered the use and combination of black and white photography with full color pictures to point out individual parts of a whole. Similar to our elementary "parts of..."...
The exercises of the Short Bead Chains prepare the child for multiplication as he ‘skip-counts’ the bead chains. Also included is a bead square for each number 1-10.
This set of material represents three cases of the Theorem Of Pythagoras. In the first, 2 sides of the triangle are equal; in the second, the sides of the triangle are in the...
A set of blue Geometric Solids used for the calculation of volume. The solids are derived from a base of 10 x 10 cm and a height of 20 cm. Each sold individually.
The Clock Exercise introduces the concept of time. It develops visual perception as well as language. Time is presented as 4 segments: the whole hour, a quarter past the hour,...
When the rest of the Eastern World was enjoying an explosion of culture, literature, and freedom, the American Indians were fighting to stay alive. When others were considering...