Self-instruction learning appts - has series of stacked perforated cards bearing programmed instruction information frames and questions and answers

摘要

The series of cards, which are learning units for programmed instruction respective frames of information, questions or problems and answers or solutions, are arranged in like orientation and in ordered sequence in a stacked pack in a stack-form-maintaining container. A perforation margin of each card has a hole corresponding to a correct answer response, or additionally for incorrect responses, a slot or slots coincident with an underlying card hole. The holes or slots are arranged at answer selection locates designated adjacent the perforation margins of the cards, so that withdrawalshiftability or not of an individual exposed top card, by a re sponge selection rod penetrating a margin concealing strip, indicated a correct or a wrong answer.