Discusses doing science experiments on a small scale in order to reduce the quantity of chemicals used in science classes. (MKR)

Tensile and compressive forces in planar trusses can be analyzed using either the method of sections or the method of joints. This article summarizes and extends a project accomplished by a high school student using the method of joints and graphing calculators, spreadsheets, and matrix-manipulation software. (MKR)

Presents an activity to construct DNA and RNA models consisting of hundreds of nucleotide units. Provides students with insight into the composition and use of the DNA code. (JRH)

Presents food science experiments designed for high school science classes that aim at getting students excited about science and providing them with real-life applications. Enables students to see the application of chemistry, microbiology, engineering, and other basic and applied sciences to the production, processing, preservation, evaluation,…

Presents a segment of the Geoscience Education booklet, Climate Change, that contains information and activities that enable students to gain a better appreciation of the possible effects human activity has on the Earth's climate. Describes the Terrace Temperatures activity that leads students through an investigation using foraminifera data to…

Performed a variance analysis of the relation between the amount of time students spend experiencing hands-on science and science achievement. Reports that students who engaged in hands-on activities frequently scored significantly higher on a standardized test of science achievement than students who did not. (Author/JRH)

Presents information about making a scale model of Jupiter and its system of moons. (MKR)

Describes a science activity that involves dropping weighted strings from a second floor window or the top row of gymnasium bleachers. The activity, which takes only a few seconds, helps students understand the physics concepts of speed, acceleration, and terminal velocity. (TJQ)

Presents the "Before Technology and After Technology" lab where students first complete a simple lab and graph the data by hand and then repeat the lab using graphing calculators. Enables students to see how technology can make data collecting, graphing, and analyzing more fun. (JRH)

Presents and analyzes data focusing on how teacher and students moved between theory and data in a unit designed to engage seventh-grade students mostly in the deductive direction of scientific activity, and how the dialectic of education was played out in the classroom as teacher and students were engaged in the activity. Contains 29 references.…

Presents an activity in which students draw the decay curve for a medical radioisotope and determine its half-life. (MKR)

Describes a project designed to teach students how to measure ground-level ozone and determine ozone concentrations. Enables students to research the effects of ozone exposure and discuss ways to clean up the problem. Includes an activity based on the oxidation capability of ozone. (JRH)

Elementary school teachers can use a bicycle to teach students about force, gear ratios, and efficiency. Students can estimate the gear ratios of multispeed bicycles, measure the distance the wheels travel at each gear ratio, and measure the force necessary to pedal at each level. (MDM)

Describes a chemistry classroom project of forming a company to acquire 10,000 pounds of zinc sulfate monohydrate from a company that wanted to dispose of it. The zinc was eventually sold to an agricultural company for use in fertilizer. (PR)