This independent self-study course on electricity was developed from military sources for use in vocational education. The course provides a source of study materials on the principles of electricity. The five lessons are divided into two parts, each of which contains criterion objectives and self-tests. The course provides basic coverage of atomic structures and matter; series and parallel circuits; measuring devices; batteries and electromagnetism. The course is presented in a programmed instruction format, in small steps using frames, and is easy to read and understand. Criterion objectives, self-tests, and answers are given. The materials are suitable for supplementing classroom activities, for enrichment materials, and for additional help for slow learners.(KC)