Short articles describe the construction and use of a probe for measuring magnetic fields, the determination of the speed of electromagnetic transmission by utilizing standard time signals relayed from an orbiting satellite, and an apparent paradox in the theory of electron deflection in cathode ray tubes. (AL)

Describes a method of calculating the equilibrium constant from free energy data. Values of the equilibrium constants of six Bronsted-Lowry reactions calculated by the author's method and by a conventional textbook method are compared. (LC)

Part I of a two-part article that examines the doctrine of special creation embodied in the Creation Research Society's high school biology textbook, Biology: A Search for Order in Complexity" from an historical perspective. This part examines the arguments from design and catastrophism. (AL)

A description of teacher resource materials recorded on keysort cards for easy retrieval and organization. (CP)

Describes procedures, results, and conclusions of a study designed to determine some characteristics of high school physics students. Four standardized tests were administered to 2,419 students enrolled in physics classes during 1967-68. Results indicate that the physics student has above average intelligence, strong mathematical and science…

Describes types of molecular models (ball-and-stick, framework, and space-filling) and evaluates commercially available kits. Gives instructions for constructive models from polystyrene balls and pipe-cleaners. Models are useful for class demonstrations although not sufficiently accurate for research use. Illustrations show biologically important…

Reviews history of earth science in secondary schools. From early nineteenth century to the present, earth science (and its antecedents, geology, physical geography, and astronomy) has had an erratic history for several reasons, but particularly because of lack of earth science teacher-training programs. (BR)

Presents the procedures, findings, and conclusions of a study designed to determine the nature and amount of activities of secondary science student teachers during practice teaching. Subjects were 23 student teachers at the University of Kentucky. The time spent weekly on various activities were related to several teacher variables. (LC)