Provides an overview of the current methods of behavior modification, reviews some critical issues, such as fear of control, use of aversive control, and behavior modification in prisons, in an effort to aid in differentiating warranted from unwarranted concerns. Ethical standards and practices are discussed. (Author/AM)

Describes a series of activities for demonstrating the conditions necessary for burning (fuel, oxygen and temperature) plus several related phenomena. (CP)

Lists changes which have been made in second edition and explains the philosophy upon which the alterations were based. (CP)

Describes safety education curriculum units produced by the Science Teacher Education Project (STEP) in Great Britain. (MLH)

Students enrolled in an introductory, audio-tutorial biology course were randomly assigned to either the control group, which followed the regular program and took pre and posttests designed for this study, or to the experimental group, which followed an identical program with additional exercises specially designed to teach higher cognitive…

Describes a laboratory experiment on geometrical optics designed for life science majors in a noncalculus introductory physics course. The thin lens equation is used by the students to calculate the focal length of the lens necessary to correct a myopic condition in an optical bench simulation of a human eye. (Author/MLH)

Discusses the principle of operation of phase-sensitive amplifiers. Gives three examples, suitable for undergraduate laboratory use, of the use of phase-sensitive, or "lock-in" amplifiers. Concludes with a description of an inexpensive lock-in amplifier which has an overall voltage gain of 1000. (Author/MLH)

Reports on a one day conference on experimental physics in school and university. States opinions of some of the participants who felt that practical rather than theoretical work should be stressed. (CP)

Describes a study which compared the exam scores of students who worked in groups to those of students who worked as individuals in an undergraduate organic laboratory course. Results showed that the group approach produced significantly higher exam scores for low achievers. (MLH)

This is a description of the materials developed for the language laboratory of the Ecole de Francais Moderne at the University of Lausanne. The tapes are designed to deal specifically with French phonetics, grammar, and lexicon. (AM)