A number board apparatus for teaching beginning set and number theory to young or educationally handicapped children and including a carrying tray having a generally rectangular base with an upright sidewall rising from each of its edges, a plurality of work blocks freely slideable on a top surface of the base until contacting a sidewall or another block, each work block having indentations in the form of a numeral and/or a rectangle which are receptive to removable numeral or rectangular unit marker pegs, respectively. Several optional members such as covering boards and specialized work blocks may also be used with the number board apparatus.

Number board apparatus

Apparatus for teaching and learning basic arithmetic

Mathematics teaching device

A competitive board game in which two playing boards are used and a set of 117 tiles for placement upon the playing boards, the playing boards having spaces where the tiles are to be placed, some of the tiles having arithmetic addition, subtraction, multiplication and division symbols while other of the tiles have the numerical digits, the game using arithmetic so to be played.

Arithmetic board game

Fraction demonstrating device

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Lehrmittel zur Erlernung des Rechnens.

Lehrmittel für den Rechenunterricht.