Shows that the conventional wisdom about the extreme inaccuracy of stopwatch measurements during the acceleration and free fall of objects is mistaken. (ZWH)

Presents a laboratory exercise in which students test the pH of different substances, study the effect of a buffer on acidic solutions by comparing the behavior of buffered and unbuffered solutions upon the addition of acid, and compare common over-the-counter antacid remedies. (MKR)

Using the movie Star Wars as inspiration, an activity is presented to introduce students to water's cohesiveness and how the surface tension of water can be disrupted. (MKR)

Describes a simple, inexpensive system that allows students to have hands-on contact with simple experiments involving forces generated by induced currents. Discusses the use of a dynamic force sensor in making quantitative measurements of the forces generated. (JRH)

Presents a laboratory demonstration that helps students understand the concept of microscope calibration. (JRH)

Presents a simple but effective experiment that uses ultrasonic transducers and some basic electronics to study the speed of sound using the Doppler effect. Eliminates the noise problems associated with most sound experiments. Discusses the theory, and describes the apparatus and procedure. (JRH)

This rationale for teaching elementary-level science using a hands-on approach emphasizes the importance of students learning the process by which an outcome arises rather than just remembering the outcome. The article encourages use of everyday objects rather than fancy scientific apparatus and offers suggestions for helping students undertake…

Describes the construction of a simple micro well colorimeter, some examples of its use, and its value in a high school or undergraduate chemistry curriculum. (ZWH)

Describes a safer, less expensive, preparation-efficient lab (microchemistry and mole) to aid teachers in teaching chemistry. Equipped with small-scale, hands-on activities, teachers can provide students an activity that allow them to collect, analyze, and discuss data all within a single class period. (ZWH)

Asserts that concerns over the use of animals in science education is confounded by the unworthy introduction of false sentiment by animal rights groups, which persist in ignoring the realities of biology. (PR)

Presents a fun-filled activity in which students create the perfect Kool-Aid recipe. Incorporates chemistry, cooperative group skills, experimentation, and recording of results. (JRH)

Presents problems appropriate for high school and college students that highlight dilution methods. Promotes an understanding of dilution methods in order to prevent the unnecessary waste of chemicals and glassware in biology laboratories. (JRH)

This book contains scaled-down versions of Exploratorium exhibits that teachers can make using common, inexpensive, easily available materials. Each topic begins with a drawing of the original exhibit on the museum floor, a photograph of the scaled-down version which contains an introduction to the exhibit, a list of materials needed with…