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Authors. Many of the ideas in these lessons have been borrowed from elsewhere and developed by previous instructors of this course. Most of these labs have been tested and revised for many years. The following individuals are responsible for the particular representations in this website. All correspondence should be addressed to: kfisher@sciences.sdsu.edu.

Acknowledgments. Many ideas have come from other sources. Not all can be mentioned but key among them are:

Support.These lessons are being posted on line as a service to teachers in San Diego and elsewhere with support from National Science Foundation Grant DUE-9555089 and San Diego State University (SDSU) College of Sciences.

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Correspondence