A study examined the impact of the Centers for Disease Control's home study course in community hygiene on the job performance of 45 sanitarians in 30 districts throughout North Carolina. Data were collected from: (1) pre- and post-tests that evaluated the sanitarians' mastery of knowledge in such areas as water supply, sewage disposal, solid…

In the summer of 1989, Summer Home Learning Packets in mathematics and language arts were distributed to seventh and eighth graders at Calverton Middle School (Maryland). The packets contained review exercises for students to complete with the help of their parents. In the first of the two studies reported in this document, "Reactions of…