Presents instructions to build a device that helps students see the effects of the ultraviolet radiation around them. Suggests ways to utilize the device. (MDH)

Discusses three possible methods of thinking about the implications of the definitions of the Avogadro constant and number. Indicates that there is only one way to arrive at a simple and standard conclusion. (CC)

Replies are given to students' complaints about their physics textbook, "PHYSICS, Principles and Problems" (Merrill, Bell & Howell). Indicates wrong answers to some of the problems in the book. Discusses several topics identified by the students. (YP)

Described are features of a theoretical model for fluid pressure. Analyzes six introductory physics textbooks based on an introduction and meaning of the pressure concept; characteristics of pressure; and liquid as a pressure transmitter. Presents three models of pupils' conceptions. (YP)

This study explored the usefulness of an approach to science instruction which specifically considered children's spontaneous conceptions about natural phenomena. The aim of the instruction was the development of conceptual understanding. The instructional approach involved diagnosing children's spontaneous conceptions, making them aware of their…

Discusses the design of introductory physics course for elementary education majors and nonscience majors. Describes the learning cycle used for constructing hands-on activities. Provides an example of a week's activity on energy. Presents an evaluation of the course based on examinations and the teacher's impressions. (YP)