Manually operated teaching machine - book form, flexible strips moved to uncover coloured reference marks which indicate answers

摘要

Manually operated teaching machine enables one to increase ones knowledge of a subject by answering a series of questions which are displayed upon a special card. Several answers are given for each question, the user has to choose the correct answer and indicates this answer by pressing onto a simple plastics strip. The exactness of the answer is indicated by a coloured reference mark displayed on another card. The coloured reference marks, indicating the chosen response, are revealed by pressing on the flexible strips which uncover a series of windows formed in the rigid support of the machine. The questions are inscribed on bound or loose leaf auto corrective cards designed for the machine.