Abstract: An educational device has a board divided into a plurality of individual spaces on each of which respective preferably raised numbers are located. Two switches are mounted in the board adjacent each number, and closure of one of the respective switches activates an electric circuit to illuminate that number, while closure of the other of the respective switches activates a second electric circuit to produce an audible indication. The numbers may be in one or more colors, and space is provided adjacent each number on which a student may write that number. Moreover, a respective set of one or more sockets is formed in the board adjacent each number to receive one or more pegs, and the number of sockets in each set corresponds to the actual number to which it is adjacent.