Abstract: An educational system for teaching or aiding in the teaching of mathematics and number systems, and numerical and dimensional relationships comprises a base member having a plurality of parallel extending tracks, each track divided into different units of one or more number systems, such as metric system and the English measurement systems. The divisions of the respective tracks are both visual and tactual and a plurality of different indicators are available for indicating points or numerical values on the various scales. A plurality of dimensioned blocks of the various dimensions utilized in the system are provided for manipulation in conjunction with the various tracks for not only visual but tactual sensing of numerical values, dimensions and relative values.