Presents an activity in which students use microscopes and digital images to examine Elodea, a fresh water plant, before and after the process of plasmolysis, identify plant cellular structures before and after plasmolysis, and calculate the size of the plant's vacuole. (ASK)

Points out the importance of effective health education to fight against tuberculosis (TB) which is the number one fatal infectious disease around the world. Describes a science curriculum on tuberculosis that includes information on the facts about tuberculosis, a forum on tuberculosis, and evaluation. (Contains 17 references.) (YDS)

Explains how to use magnets to demonstrate the electron flow mechanism of a chemical reaction. (YDS)

Describes an activity using rubber bands to demonstrate Gibbs free energy, entropy, and enthalpy. Includes instructor information and a student activity sheet. (YDS)

An atlatl is a thrower for propelling a flexible dart through the air. Describes a class investigation for making an atlatl using a piece of dowel. (Author/MM)

Describes a simple exercise in percolation theory that can be performed easily and quickly in a laboratory using paper and a hole punch. (Author/MM)

Advances in the chemical and materials sciences have had dramatic impact on sporting events. Discusses some of the chemicals and materials involved in these advances with the intention of providing a mechanism to interest students in chemistry. Presents structures and properties of some materials that led to their adoption in sports and ideas for…

Describes a simple laboratory activity illustrating the chemiosmotic principles of active transport in yeast cells. Demonstrates the energy coupling mechanism of active a-glucoside uptake by Saccaromyces cerevisiae cells with a colorimetric transport assay using very simple equipment. (Contains 22 references.) (Author/YDS)

Describes a classroom activity that teaches the mechanism of genetic drift to undergraduates. Illustrates a number of concepts that are critical in developing evolution literacy by sampling M&M milk chocolate candies. (MM)

Presents a simple experiment to help students visualize the concept of displacement current. (CCM)

Examines the simultaneous occurrence of ultraviolet light and the photoelectric effect. (CCM)

Introduces a science unit on heart rate variability (HVR) patterns. Uses spectral analysis to determine the effects of environmental stimulants such as music and emotional stress on heart rate. Observes relaxation techniques and their effects on the autonomous nervous system. (Contains 12 references.) (YDS)

Presents a learning project in which students prepare a guided, multisensory rain forest tour representing its ecology. Develops five stop points presenting a theme or an important aspect of the rain forest. Includes a list of selected resources for rain forest studies. (YDS)

Reviews some ways in which developments in biotechnology can be used to explore both biology and the social impact of this science on the wider community. Includes specific examples to help students explore the ramifications of biotechnology. Reviews approaches that can help teachers help students address social, ethical, and political issues…

Presents activities on evolution and describes how to integrate lessons on evolutionary biology. (YDS)