Provided are six ideas for lessons and projects which could be done in secondary school science classes. Topics include alcohol; the relationship between water availability and water loss in plant growth; the effects of acids on teeth; woodlice clustering; the ecology of frogs; and human blood pressure and heart rate. (CW)

Discusses the use of linear regression methods to extrapolate experimental data. Describes the method of averages and two weighted least squares. Calculates the error range of each method. (YP)

Described are techniques used in a course designed to teach biology as a process to improve students' skills in critical thinking, reasoning, and writing. Results which indicate improved performance on subject-content tests, increased student motivation, and understanding of science as a process are stated. (RT)

Described is a technique for monitoring the quality of freshwater aquatic habitats. Methods, comparison of samples, equipment, and data analysis are discussed and an example is presented. (CW)

Described are the techniques and results of using this tissue culture activity. Discusses the advantages of using such techniques in teaching alternation of generation life cycles to biology students. (CW)

Described is a demonstration of Snell's law using a laser beam and an optical fiber. Provided are the set-up method of the demonstration apparatus and some practical suggestions including "index matching" technique using vaseline. (YP)

Describes a demonstration to show the character and behavior of mixing clouds. Discusses laminar and turbulent flow, and the formation of contrails and other cloud phenomena. (CW)

Described are videotapes for elementary school teachers. Outlines seven examples of demonstrations from physical science. Provides information on how to obtain the tapes. (YP)

Develops a teaching scheme for 11-13 year-olds based on different types of investigational practical work. Includes discussion of difficulties in investigations, four types of investigations, and deployment in the curriculum. (YP)

Described are five physics activities including two superconductor projects, synchronizing video camera movements, electrical analysis of a bicycle, and apparatus for the measurement of thermal conductivity. (YP)

Discusses two strategies that provide concrete-thinking students with opportunities to develop and use formal or critical-thinking skills. Describes using task analysis and long-term investigations in the classroom. (YP)

Discusses the shock wave sweeping through traffic flow. Describes the characteristics of kinematic waves in different traffic flows. Presents the author's experiences in studying traffic flow. (YP)

Presents activities that enable students to determine the exact time of midday and to use this to plot a north-south line. Uses shadow experiments to teach the concepts of rotation of the earth and calculation of latitude. (JRH)

Discusses a program in which students complete surveys identifying home energy and water use and its impact on the environment. Survey results are entered into computers lent to the school by a sponsoring utility company. Includes sample activities. (MKR)

Discusses the need for integration of the learner's culture into the academic and social context of the science classroom to aid and support academic learning. Presents a typology of cultural inclusion that enables science teachers to determine the extent that currently used instructional strategies, curriculum, textbooks and other resources,…