Suggests a series of science activities in botany for the elementary school classroom. Contains suggestions on the care and propagation of the coleus plant. (CP)

Describes the apparatus and procedures for constructing simple AM radio circuits with a minimum of electronic components. (SL)

Describes the apparatus and procedures for conducting a simple speed of light experiment in an average laboratory using a laser source, a rotating mirror, and an oscilloscope. (SL)

Provides demonstrations using digital display instruments of some of the mass and pH-related topics covered in first-year chemistry courses. (CP)

Explains the theory and laboratory construction procedures of a positive photoresist. (CP)

Describes a laboratory procedure which does not demand sophisticated equipment. (CP)

Reviews several schemes for organizing science laboratory objectives and activities and for analyzing several techniques designed to measure these laboratory outcomes. The need for further study and analysis of psychomotor behaviors in science education is emphasized. (HM)

Light-emitting diodes (LEDs) are described and three classroom experiments are given, one to prove the, low power requirements and efficiency of LEDs, an LED on-off detector circuit, and the third an LED photoelectric smoke detector. (BB)

The authors maintain that an interdisciplinary approach to health and science education can encourage dialogue between citizens, government, and the scientific community. They describe the Elementary Science Study (ESS) curriculum, which integrates health and science education through classroom experimentation. (Author/DS)

Tests the egocentric hypothesis, i.e., if it can be shown that, given spatial cues, an infant searches at a position bearing an invariant relation to these cues, but with a varying egocentric position, then there would be strong evidence that his organization of space is not necessarily egocentric. (Author/RK)

Two experiments investigated serial recall with eight-word lists in which the frequency rating of the terminal word was manipulated. The effect on recall of two kinds of verbal "stimulus suffix" as well as a control noise suffix was also tested. Recall for the terminal items in the lists was analyzed. (Editor)

Two cognitive models of depression have attracted considerable attention recently: Seligman's (1975) learned helplessness model and Beck's (1967) cognitive schema approach. Describes each model and, in two studies, evaluates the assumption that depression is associated with systematic distortion in cognition regarding causal and controlling…

The relative effectiveness of two methods of instruction, orally-presented lessons and a written version of those lessons, was investigated using a post-test, an attitude scale, and time taken for instruction as criteria. (Author/RK)

Experimental procedures for studying enzyme activity using a Spectronic 20 spectrophotometer are described. The experiments demonstrate the effect of pH, temperature, and inhibitors on enzyme activity and allow the determination of Km, Vmax, and Kcat. These procedures are designed for teaching large lower-level biochemistry classes. (MR)

A quick, sensitive method which is adaptable for quantitating periodate consumption in a variety of undergraduate laboratory contexts is described. A laboratory procedure is also given that may be used for measurements of reaction rates as a function of temperature. (MR)