Described is an astronomy lesson designed to explore the relationship between the angle of the sun, the position of the north star, and the horizon line of a local area. Activities for teaching protractor fundamentals are included. (CW)

Described is an activity which uses a 96-well reaction plate and soda straws to construct a model of the periodic table of the elements. The model illustrates the ionization energies of the various elements. Construction of the model and related concepts are discussed. (CW)

Discussed are various types of electrical outlets and safety issues which involve their use. The reduction of shock hazards in the laboratory and at home is highlighted. (CW)

A procedure for extracting DNA from yeast using common reagents and equipment is given. Suggestions for variations are provided. A second activity for building a model of DNA from toothpicks is included. (CW)

Presented is information about the National Science Teachers Association computer bulletin board, Science Line. Described are the features of the service and how teachers may gain access. (CW)

Equipment and procedures for simple astrophotography are discussed. Sample photographs are provided. Suggested are several uses of the slides and the techniques for teaching astronomy. (CW)

Several activities that can be used to teach the science of bar codes are presented. Examples of simple codes are provided. The use of bar code scanners is discussed. (CW)

Presented is an activity in which the composition of margarine is analyzed. Materials and procedures are discussed. An extension activity on emulsions is suggested. Background information on the history of margarine is provided. (CW)

Directions for the construction of an electronic version of an electroscope are provided. Demonstration and operation of this apparatus is discussed. A list of components and a schematic diagram are provided. (CW)

The fundamental principles of the superconducting super collider are presented. Arguments for the construction of this apparatus and policy issues surrounding its construction are discussed. Charts of the fundamental atomic particles and forces and the history of particle accelerators are provided. An activity for discussing this controversial…

Described is the Western Massachusetts Five College/Public School Partnership which sponsors a range of activities for teachers in the sciences and humanities. The development of this program is discussed. A list of five components of a successful collaboration program is included. (CW)

Discussed is the concept of global education as it relates to scientific literacy and science/technology/society education. The use of science as a model for global education is proposed. Included are suggestions for including global education in science curricula and teacher education. (CW)

Described is an activity in which students determine the percent composition of zinc and copper in pennies minted before and after 1982. Students also use pennies to show the natural relative abundance of isotopes and to explain how the weighted atomic mass of the elements is determined. (KR)

Presented is a list of over 50 commonly held misconceptions based on a literature review found in students and adults. The list covers earth science topics such as space, the lithosphere, the biosphere, the atmosphere, the hydrosphere, and the cryosphere. (KR)

Presented are some techniques aimed at motivating more high school students to take elective courses in chemistry and physics. Discussed are teacher attitudes about who should study chemistry and physics, preassessment of new topics, and the importance of communication between science teachers. (KR)