Teaching machine

Claim 1

An educational system which comprises the combination of a record member and a teaching machine having: a housing adapted to receive a record member; a keyboard on said housing; a display on said housing constructed and arranged to display the answer to a problem appearing on a record member having recorded thereon visually readable statements of a plurality of problems and corresponding machine readable answers if a student first enters the correct answer on said keyboard; means for incrementally advancing a record member on a path through the machine; a viewing area formed on said housing and positioned at a predetermined position on said path for rendering visible one of the visually readable statements of a problem; reading means for reading the machine readable answer corresponding to the problem rendered visible in said viewing area; means for energizing said display to display the answer to the problem visible in said viewing area if the answer entered on said keyboard corresponds to the answer read by said reading means; and interrogable means for storing and selectively displaying information on said display for determining the number of problems answered correctly and answers attempted by the student; and the record member comprising: first and second opposing planar surfaces; a column of visibly readable statements of problems on said first planar surfaces; a column of machine readable answers on said first planar surface corresponding to the problems on the column of visibly readable statements of problems; indexing means on said record member to enable incremental advancement of said record member; and the machine readable answers in said column of answers being displaced from the corresponding visibly readable statement of a problem in said column of problems to impede visual decoding of the machine readable answer.