Describes an apparatus to be used in a visual presentation of simultaneous, independent motions and their resultants. The apparatus is best suited for representing a boat and stream, but could be modified to represent a plane in a moving air mass. (Author/DS)

Presents two experimental set-ups. The first demonstrates the law of Malus using a pair of Polaroid polarizers and a monochromatic light source with an interference filter. The second describes a modification of Hilton's apparatus to demonstrate the effects of the magnetic hysteresis on an overhead projector. (CS)

Contrasts the teacher-training goals of nineteenth-century laboratory schools with John Dewey's pioneering approach which has resulted in today's research- and experimentation-oriented laboratory schools. Explains why such schools have received criticism for lack of accomplishment. Outlines features of inquiry-oriented laboratory schools and…

Presents nine physics notes for British secondary school teachers. Some of these notes are: (1) speed of sound in a steel rod; (2) physics extracts-part four (1978); and (3) a graphical approach to acceleration. (HM)

Presents a viewpoint regarding guidelines that should be established in publishing reports of teaching innovation in laboratory courses. (CS)

Describes some undergraduate laboratory experiments in acoustics which involve the analysis of speech and musical instrument sounds and the general analysis of the frequency range of complex sounds. (HM)

Presents the "extended discretion" approach as another dimension to conventional biology laboratory investigations. Results of a study comparing this approach to BSCS investigations indicate that tenth-grade students can handle increased discretionary demands related to their learning activities, thus encouraging responsibility and…

A language experience approach to teaching reading is a multifaceted program that encompasses more than just self-expression. (Author/JM)

Reports methods for identifying carcinogens and suspected carcinogens in the undergraduate laboratory and makes recommendations for their elimination or control. (CS)

Presents experiments that illustrate some physiologically important aspects of ligand binding to hemoglobin. (CS)

Describes a technique for the supercooling of water, for use in the science classroom, involving adding common salt to a mixture of ice and water. Several investigations are included for use during (and after) the process of supercooling. (DS)

The value of the language laboratory of self-instruction is stressed. Methods of using multi-phase drills are given, proceeding from cue repetition to open-ended situations. The presentation of prose texts in the laboratory is examined. (Author/JB)

A test is described in which three psychotropic drugs were evaluated for their effects on pregnant rats. Behavioral changes are given. (SA)

Described are various methods for producing black and white photographs of microscope slides using single lens reflex, fixed lens, and plate cameras. Procedures for illumination, film processing, mounting, and projection are also discussed. A table of comparative film speeds is included. (CS)

Describes a college child development course which included a "Living Lab" that provided opportunities for the students to observe and interact with 15 parents and their children. (SS)