Describes how a film regarding a controversial issue (evolution education) can be used in the classroom to generate student interest and initiate excellent opportunities for teaching critical thinking skills in high school biology. Daily activities are provided to demonstrate how a lesson on evolution was built around this film. (ZWH)

Two computer-generated star charts that can be used as overlay transparencies to show an expanding universe are presented. Directions on how to use the star charts to determine the Hubble constant and the age of the universe are provided. (KR)

Presents a method for graphically illustrating Le Chatelier's principle, suitable for the general chemistry undergraduate. (CS)

Describes a project in the United Kingdom designed to produce materials for methods courses. (BR)

Describes a kindergarten science program, concerning astronomy, designed to introduce scientific concepts into the curriculum at an early age. Specific activities in conjunction with the unit are detailed. (BR)

Describes the construction and use of a star projector built from an overhead projector and high-impact polystyrene plastic. Includes patterns for the star charts and the projector frame. (MA)

Describes a technique of making microscope images viewable by a small group and for making pictures of the images without a camera. (SL)

Considers carbon-carbon multiple bonds in terms of Pauling's bent bond model, which allows direct calculation of double and triple bonds from the length of a CC single bond. Lengths of these multiple bonds are estimated from direct measurements on "bent-bond" models constructed of plastic tubing and standard kits. (CS)

The construction and uses of a device to facilitate the use of an overhead projector to show chemical reactions is presented. Materials and instructions for construction as well as reactor vessels are discussed. (CW)

Students often have difficulty relating contour lines to the shape of a landform. This article describes the construction of a simple landform model designed to help students better understand contour lines. (MA)

Discusses the laboratory portion of a beginning noncalculus physics course that uses concrete examples of abstract concepts. Describes the use of coffee cans to explain oscillations and plastic darts to illustrate collisions. (MLH)

This article is a reproducible page for students in grades four through six. The stated objective is the student will organize information about unfamiliar animals and infer other information. Students read clues about five newly discovered species and use a chart to organize this information in a more meaningful way. (PR)

Presents directions for constructing a hair hygrometer for detecting moisture in the air, outlines factors related to human space flight and reaction time, and explains the construction and use of a visual aid for map work. (GS)

A description of an apparatus for demonstrating the trajectory of a charged particle, is given. A photograph of the equipment used in the demonstrations accompanies the text. (SA)