A doctoral dissertation study was made to investigate the effects of context and size of step to meaningful learning and retention in a linear instructional program, developed in accordance with the RULEG system, for 5th grade pupils. Among the variables explored were: (1) the mean number of acquisition errors; (2) the mean time required to…

Pupil learning about evolution under different types of instruction is examined. A branching style program in which written responses were required was compared with a program in which the same material was presented in straight narrative style. The project compiled and analyzed test results from 115 fifth-grade students. The students were divided…