Presents information on biodiversity and explains why biodiversity is important. Describes threats to extinction of organisms and the potential negative impact of such extinctions. (PR)

Presents information on insects as an illustration of the importance of biodiversity. Explains useful roles insects play in the ecosystem. (PR)

Presents information and data on an experiment designed to test whether different atmosphere compositions are affected by light and temperature during both cooling and heating. Although flawed, the experiment should help students appreciate the difficulties that researchers face when trying to find evidence of global warming. (PR)

Presents information about eclipses and how to teach the concept to students. Explains what makes an eclipse annular. Presents different methods for safely viewing eclipses. (PR)

Presents scientific and technical information related amateur radio operation, commonly called "ham" radios, and radio astronomy. (PR)

Presents information on using analogies in science instruction. Describes the Teaching-with-Analogies Model. Presents an example for homeostasis. (PR)

Describes the statistical test of chi-square analysis. Explains how this test can be used in biology instruction. Examples from blood typing are used. (PR)

Describes the procedures for starting and maintaining a bee hive to enhance any lesson on the study of bees. (ZWH)

Provides a historical account of some of the explanations that were posed to describe the behavior of gases. Emphases are placed on gas theories presented by John Dalton. (ZWH)

Provides an activity using concrete examples to help students understand Dalton's atomic theory and explore its link to finding empirical formulas. (ZWH)

Shares some of the laboratory activities and demonstrations developed in a physics classroom with the use of a video camera. (ZWH)

In response to the Texas Hazardous Communication Act (THCA) of 1986 which raised many new health and liability issues regarding students in science laboratories, a laboratory safety survey was generated for use in evaluating laboratory safety. This article contains the easy-to-use survey. (ZWH)

Provides a brief overview of the constructivist learning model and characterizes the science classroom where the constructivist model can best be used. (ZWH)

Presents simple and safe activities for student use in the classroom or at home to help them to better understand the unique properties of water. (ZWH)

Discusses the establishment and implications of programs and workshops developed in response to Florida's State Comprehension Plan for Mathematics, Science, and Computer Education. Emphases are on efforts geared toward expanding support for precollege science teaching. (ZWH)