TEACHING MACHINE IN WHICH INSTRUCTION ITEMS ARE PROJECTED BY AN IMAGE PROJECTOR

摘要

A strip film, carrying instruction items and questions with response indications thereon, and additionally, coded response code tracks (which are blocked from view of the student) is projected on a screen; the student is provided with a pointer having a photosensitive end, responding to the response items. A movable mask scans across both the response items and the response code track, and electrooptical transducers transmit the pulses upon scanning of a code position on this code track and the pulse from the photosensitive end to a logic circuit, which determines which code track has time-coincidence with the pulse from the photosensitive end. Subsequent indexing of the film to further instruction items (which may be entirely new instruction items or sub-items in further explanation in case the answer was wrong) is then controlled by the logic circuit decoding the coincidence of indication from a particular track and the photosensitive end.