Teachers often use demonstrations to prepare students for a science experiment. This article describes a demonstration method to ensure that students are not supplied with all the answers before the actual experiment and to help them to remain an active part of the science lesson. (ZWH)

Describes the ways in which our own view of the world effects the way that we interpret information. Contends that we need to know the difference between perceptions and illusions. Discusses the world of illusions; haptic senses; adaptive adjustments; and visual illusions. (ZWH)

Describes an activity that allows students to design and build a craft whose propulsion is derived entirely by the carbon dioxide produced in the chemical reaction between baking soda and vinegar. (ZWH)

Describes an activity that helps motivate students to learn motion equations by allowing them to observe and analyze their own sports performances. (ZWH)

Discusses how you can use a sonar-based fish finder to engage students in an activity that allows them to make their own topographic map of a surface that they cannot see. (ZWH)

Describes some of the dangers involved in working with gas discharge tubes in the laboratory. (ZWH)

Describes a simple, relatively inexpensive laboratory activity that allows students to examine the requirements for the fungal decay of wood and devise methods for prevention. (ZWH)

Provides a brief discussion of the controversial issue of logging as it relates to the extinction of the spotted owls. Suggests ways to help students understand both sides of the issue. (ZWH)

Provides activities that help students to understand the importance of the scientific method. The activities include the science of fusion and cold fusion; a group activity that analyzes and interprets the events surrounding cold fusion; and an application research project concerning a current science issue. (ZWH)

Describes the easy collection procedures and classroom uses of live planarians. Suggests that the use of live animals in the classroom will allow students to observe different biological processes exhibited by living organisms. (ZWH)

Describes a science project, Interactive Space Physics Ionosphere Radio Experiments (INSPIRE), that allows students to work with physicists to address unanswered questions about the physics of space. (ZWH)

Describes a learning module designed to help students use the factor labeling method in problem solving. (ZWH)

Describes a four-step ethics course for students. The following steps are discussed: (1) show that moral dilemmas exist; (2) assign weights to arguments; (3) cost-benefits analysis; and (4) examine known biases. (ZWH)

Describes an exercise using flames that allows students to explore the complexities of a seemingly simple phenomenon, the lighting of a candle. Contains a foldout that provides facts about natural gas flames and suggestions for classroom use. (ZWH)

Describes an activity designed to help students develop a better understanding of watersheds and deepen their respect for the entire planet. (ZWH)