Suggests a new experiment to study the genetic material of eukaryotes. It is based on the rapid growth and interest of the research on chromatin. (TW)

A cost-analysis competition was introduced into the experimental synthesis sequence of an organic chemistry course. Rationale for the approach as well as experiments involved are discussed. (JN)

Following the supposition that study of a subject through a specific problem is an effective way to develop thinking, the author advocates classroom experimentation that requires the student to put forth a hypothesis, test its validity, advance a theory, and try a new problem. (JH)

Suggests incorporating three-phase learning cycle into laboratory teaching to foster formal reasoning skills. Describes five types of laboratories, each of which offers experiences necessary for the initial phase of the learning cycle. Indicates importance of presenting concepts in a way that progresses from concrete to abstract. (JN)

The Mole Concept is a learning cycle (patterned after University of Nebraska-Lincoln's ADAPT model) for the chemical unit "mole." Discusses objectives and activities involved in each phase of the cycle: exploration, invention, and application. Indicates the cycle is superior to traditional lecture-demonstration for teaching the abstract mole…

A list of demonstrations of discrepant events which have been found to stimulate the curiosity of students in science at the secondary school level are presented. A brief description of the materials and procedures for 15 of these demonstrations is outlined, with short explanations of concepts and principles involved. (MP)

Discusses an attempt to have students learn chemistry by conducting and discussing laboratory experiments in small groups largely independent of the teacher. The project results and the 30 experiments that student groups conducted are described. (WB)

Presents three notes on new equipment, techniques, or materials of interest to teachers of physics. (HM)

Changes, reactions, deductions. Five simple experiments add new skills and excitement to science. (Editor)

Describes an activity based on shrinkable thermoplastics in which students explore the percentage of shrinkage of a plastic ruler when it is heated. Includes science content knowledge behind the shrink, national science education standards related to this activity, and a complete guide. (KHR)

Discusses how traditional lab exercises can be converted into investigative exercises. Describes an exercise on seed germination that has students design their own experiments based on their initial results. Involves students in the scientific process and allows them to experience the joys and disappointments of experimental work. (JRH)

Describes an approach that challenges students to construct illustrations of chemical reactions by using colorful Bingo card paint markers. Enables them to visually demonstrate their understanding of chemical notations and the law of conservation of mass. Also discusses teaching chemical formulas, a modeling lab, illustrating chemical reactions,…

Describes problems that are presented in the form of experiments. The philosophy, method of solution, and several examples of mechanics experiment problems are described. (LZ)

Presents two demonstrations to compare the differences between the screen reproductions of a bulb when using a converging lens and a pinhole and how that reproduction image reaches the observer's eye from multiple vantage points. (MDH)

Presents an inexpensive take-home laboratory activity designed to enhance students understanding of atmospheric pressure by allowing them to engage in a hands-on, discovery approach to physics. (ZWH)