Presents lesson plans on bread making using a student-centered approach and process skills. Includes designing the experiment, investigation, and data collection. (YDS)

Introduces a science program that provides an exciting, safe, and interactive educational experience. Describes activities and the impact of this program. (KHR)

Presents activities that have been proven to teach young learners to sort and classify objects that contain more than one attribute. The activities require that students employ the use of sorting hoops and attribute blocks to create Venn diagrams, the assembly of which requires practice. Includes cross-curricular uses of these learning tools.…

Presents a science activity on making paper airplanes in which the basic laws of physics are introduced. Provides procedures to make paper airplanes with illustrations. (Author/KHR)

A teacher describes activities sparked by the cycles of nature, "round trips," which become evident in autumn. This round trips concept is used to teach sequencing skills in reading, to hone observation skills in creative writing, and to spark interest in animal behavior. A reproducible story-writing sheet is included. (IAH)

A method of obtaining a crude mitochondrial extract from sheep and beef heart is described. The respiratory substrates succinate and malate are examined as well as the inhibitory effect of malonate. An interface with a microcomputer for plotting colorimeter results is discussed. (Author/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)

Described is a simple test tube method developed lead analysis of samples of roadside soil. The relationship between the results and the traffic flow indicate car exhausts are the major source of lead pollution. Materials and procedures are detailed. An example of results is provided. (Author/CW)

Describes an investigation of leaf relations including leaf perimeter and area using pink oak and red maple. Provides some instructional guides with typical data and graphs. (YP)

Presented is a brief history of manufacturing chocolate and an outline of production methods. Describes laboratory techniques used to monitor liquid chocolate viscosity. Discusses a simple experiment which can be performed in the classroom. (Author/CW)

Describes a field exercise exemplifying aspects of the variable source area model. States that objectives of the exercise are to ensure that students understand why there is a variation in discharge in different parts of a basin, learn a dilution gauging method, and perform necessary calculations. Appendices describe the Gulp Injection method and…

To integrate a research/discovery component into one course, an experiment using the sea urchin embryo system is introduced because the teacher manages only one organism and students provide the variables. The materials, handling methods, and experimental methods of the experiment are described. (YP)

Discussed are the molecular electronic terms which can arise from a given electronic configuration. Considered are simple cases, molecular states, direct products, closed shells, and open shells. Two examples are provided. (CW)

Described is a laboratory exercise designed to introduce students to the theory and practice of gene mapping including RNA extraction, sucrose density gradient centrifugation, labelling of nucleic acids in vitro, DNA extraction, digestion of DNA with restriction enzymes, and the southern hybridization analysis. Procedures and sample results are…

Described is the use of ordinary ceramic magnets to replace the more expensive bar magnets commonly used. Suggestions for 11 task cards to help introduce children to the uses and principles of magnetism are provided. (CW)