Describes a demonstration for elementary school children which shows how sewage removes oxygen from water, killing life forms. (BR)

Described is a technique for inducing curiosity in students through conceptual conflicts due to contradiction. A case study involving the evolution of atomic structure theory is provided. (SL)

Suggestions are provided for using animals (particularly snakes) as the focus of studies and activities in the science classroom. For example, cages with animals can serve as a learning center on various aspects of the animal. A list of suggestions for the care and feeding of snakes is provided. (JN)

To prevent increasing personal injuries and property loss, teachers need to educate themselves and their students about geological hazards. The author discusses earthquakes, downslope movement, dam failures, shoreline erosion, and other geologic hazards. Information on suggested teacher resources is provided. (DS)

Reviews Piaget's stages of development and describes types of educational activities which are appropriate for specific levels of cognitive development. (CP)

Described are techniques for studying spiders in the field. Included is a description of the spider's web building techniques with diagrams, and methods of photographing spider webs. (SL)

Describes a project for sixth-grade science class students designed to encourage them to save energy at home, and to calculate the savings on their monthly bill. (GA)

Described is a method of utilizing nomographs to increase student interest in mathematical computations, an experiment dealing with freezing water which students can perform at home, and a technique for interdisciplinary lesson planning. (SL)

Describes the simple construction and operation of an inexpensive photographic enlarger. (CP)

Photographs are provided as an aid in the description of steps involved in the construction of an aquarium. (CP)

The National Diffusion Network (NDN) is a federal program that disseminates information about exemplary educational programs and helps other schools replicate them. Each state has an NDN facilitator who can help interested teachers develop and/or find appropriate curricula. Information on applying to and participating in the NDN is given. (DH)

Provides suggestions for conducting field trips at the local school site. Points of interest might include building materials, evidence of chemical/physical weathering, variations in soil type, changes in elevation on school ground, and others. Three simple field trips are described. (JN)