Educational Technology: A Critique

dreamed of in the past. Available in the hardware category are the slide projector, the opaque projector, the overhead projector, the tape recorder, the 8 mm. film projector with sound in cartridges, the filmstrip projector with rear-projection screen, and the film-loop projector. Most recently a sound-slide projector with thirty-five seconds of talking time for each slide has appeared on the market. Software-instructional ma-