Describes a variety of science resources on the World Wide Web that can be used to enhance the science classroom. Provides a synopsis of each of the 17 websites. (Author/MVL)

Describes the Envision Project to demonstrate how teachers designed and conducted their own study, and presented the results. Identifies project ideas for environmental problems with a site survey through the Internet, aerial photographs, and maps. (YDS)

Developed is a classroom activity that illustrates the scientific method. The importance of observation, interpretation, and prediction is discussed. The activity uses pictures of the surface of Mars. (KR)

Presented are directions for making a flexible lens that can be used by students to show the bending of light rays. Diagrams are included for supplementing the activities. (KR)

Presented is a hand model which can be used to compare and contrast mitosis and meiosis. Features and procedures of the technique are detailed. Limitations of the models are discussed. (CW)

Described is a laboratory experiment designed to expose students to problem-solving methods individually and as a group. Included are background information, a list of materials, laboratory procedures, analysis methods, and probable results. (CW)

Described are teaching methods used to teach measures of central tendency to middle and high school students. Discussed are quantitative and qualitative data, basic experimental terms, a general overview of data analysis, data charts for quantitative data, qualitative data analysis, and extensions for older students. (CW)

Presented is an experiment which provides a study both of the end correction involved with open pipes and also of the effect that varying the size of the tone hole in the pipe has on its fundamental frequency. Discussed are equipment, formulas, background, and methods. (CW)

Described are two microscale chemistry laboratory experiments including "Microscale Syntheses of Heterocyclic Compounds," and "Microscale Acid-Base Extraction--A Colorful Introduction." Materials, procedures and probable results are discussed. (CW)

Presented is an activity designed to introduce introductory chemistry students to the standard reduction potential table. Included are lists of equipment and reagents, procedures, sample worksheets, and teaching directions. (CW)

Introduced is a sandstone classification scheme intended for use with thin-sections and hand specimens. Detailed is a step-by-step classification scheme. A graphic presentation of the scheme is presented. This method is compared with other existing schemes. (CW)

An outdoor activity that demonstrates the Doppler effect is described. Class predictions are verified by actual involvement in collecting data. Presented is a method of analyzing data. Safety concerns are discussed. (KR)

Three activities involving electromagnetism are presented. Discussed are investigations involving the construction of an electromagnet, the effect of the number of turns of wire in the magnet, and the effect of the number of batteries in the circuit. Extension activities are suggested. (CW)

Included are nine science activities and questions to be used in the physics classroom. Topics include light, sound, force, radio waves, inertia, friction, and levers. (KR)

Described is a procedure for studying the trajectories of projectiles using ball bearings and aluminum foil. Trajectories were measured with and without the effects of air resistance. Multiflash photography was used to determine the flight paths of all objects. (KR)