Advantages and disadvantages of using multi-image or lap-dissolve (LD) slide techniques in large lecture sections are discussed. Production, use, and evaluation of LD programs are also discussed. Indicates that these programs are an effective way of improving instruction on visually oriented topics. (JN)

Shows how flexible electric boards can be made from manila folders, strips of foil, and a battery. These boards are lightweight, and the electrical pattern can easily be changed. (JN)

Discusses types of mass media suitable for use in science classrooms. Types of media, limitations, and instructional strategies are provided. Also provided are three case studies illustrating their use. Comments on making media available to students and an annotated list of several resources are included. (JN)

Describes a demonstration that illustrates the red chemiluminescence due to singlet molecular oxygen that can be observed when aqueous solutions of hypochlorite ion and hydrogen peroxide are mixed. (MLH)

Describes several chemistry projects, including solubility, formula for magnesium oxide, dissociation of dinitrogen tetroxide, use of 1-chloro-2, 4-dinitrobenzene, migration of ions, heats of neutralizations, use of pocket calculators, sonic cleaning, oxidation states of manganese, and cell potentials. Includes an extract from Chemical Age on…

Describes how high school students used egg cartons to construct an anechoic room for conducting sound experiments in physics. (JR)

The present experiments were designed to assess retroaction and proaction effects where more than one interpolated (RI) or prior (PI) passage is learned and to determine if results are the same for eighth-grade science material as for biographies similar to those used by Crouse. (Author/RK)