Discusses problems of sample selection in explaining student performance in economics classes. Reports on a study of student performance correlated with class attendance, course dropouts, and homework. Concludes that any researcher gathering data about instructional effectiveness must account for students who drop the class. (CFR)

Reports on a study of two introductory sociology courses to determine whether informal writing assignments can aid learning. Finds that requiring students to keep journals did not significantly improve performance on essay tests. Asserts that teachers may be justified in requiring attendance as a strategy for increased learning. (CFR)

A study was conducted at Bunker Hill Community College to assess the impact of the use of learning groups on student absenteeism and academic performance. The study involved four sections of a Biology 1 class. Two sections were designated as the control group and were taught using the traditional course format, which involved a 2-hour session in…