Describes the construction and operation of a temperature programmer; it can be built for less than $100 and can be used with any gas chromatograph that uses a variable resistor to control oven temperature. (MLH)

Describes a study designed to explore systematically the practical advantages and problems of using videotapes in the undergraduate chemistry laboratory. (MLH)

Selected time components of the cardiac cycle were determined during breathing in air, breathing through a snorkel during face immersion, apnea in air, and apnea during face immersion. (PBS)

Presents guidelines for dealing with staff and the community, for setting up a "kick-off" learning center program, and for selecting a reading program. (Author/IRT)

Reviews research related to laboratory work and makes recommendations for the classroom on how to make labs more meaningful. Argues that pre- and post-laboratory discussions containing theory behind the lab and purposes of the lab are essential for new understanding. (DDR)

Describes a procedure used to measure force and pressure in elastic arteries. Discusses the physics of the procedure and recommends the use of bovine arteries. Explains the preparation of the arteries for the procedure. (DDR)

Describes an experimental project that uses plant tissue culture techniques to examine cell differentiation in the carrot. Allows students to gain experience in some important techniques and to explore fundamental questions about cell differentiation. (DDR)

Gives a step-by-step description of a problem-solving microscale chemistry laboratory to show how this implementation of problem-solving teaching can be put into practice. Pedagogical and practical issues are discussed. (DKM)

Describes a technique that uses a helium neon laser, a steel rule, a wooden rule, and a piece of paper to measure the diameter of a hair using the diffraction of light. Details on technique, mathematics, and sources of error are provided. (DDR)

Presents a laboratory investigation to demonstrate that habitat structure promotes increased organism abundance and species diversity by reducing predator effects on prey abundance. Investigates the effects of goldfish (Carassius auratus) predators on Gammarus sp. (an amphipod) and Daphnia magna (a cladoceran) prey in the absence and presence of a…

Investigates how microcomputer-based laboratory (MBL) activities specifically designed to be consistent with a constructivist theory of learning support or constrain student construction of understanding. Analysis of students' discourse and actions reveal that students invented numerous techniques for manipulating data in the service of their…

Describes cooperation with the Saint Louis Zoo to provide opportunities for elementary school students to learn about bones, how animals move, what they eat, and how much they grow. Uses biofacts which include bones, skulls, and other parts to make the laboratory a hands-on experience for students. (YDS)

Illustrates one elementary teacher's efforts to better communicate developmentally appropriate practices (DAP) with parents. Parents completed surveys regarding their own educational experiences, whether or not their experiences encompassed DAP, and whether they wanted DAP for their own children. Most parents responded positively to DAP. Few…

Examines the nature of an ideal K-12 environmental science curriculum. Evaluates major biology textbooks with regard to ecology readings and laboratory activities in each text. (YDS)