David L. Haury and Peter
Rillero, 1994
Acknowledgments
Many people contributed to the development of this document; some offered written or oral responses to the questions we asked, and others suggested questions to ask, people to contact, and materials to review. We have not included in this document every question or answer that we received, but we read them all and tried to capture the full range of perspectives and ideas submitted. However, we did not consolidate answers. We chose to let contributors present their ideas in their own words, so you will find individuals identified along with their remarks in the pages that follow. Our thanks to each of them for their help, in some cases on very short notice.
Some very helpful individuals are not identified in the pages that follow, so we would like to acknowledge their help here. Dr. Norman Lederman at Oregon State University helped us identify practitioners in the Northwest, Dr. Anita Greenwood at the University of Massachusetts Lowell helped us identify practitioners in the Northeast, Betsy Feldkamp at The Ohio State University helped us identify practitioners in the Midwest, and Dr. Carole Kubota at the University of Washington helped us formulate several of the questions posed in the pages that follow. Each of these individuals is associated with programs that emphasize hands-on approaches to learning, and they have worked with many teachers to promote professional growth in science teaching. Their voices of experience were invaluable to our work, and we thank them for their help. Finally, Linda A. Milbourne at the ERIC Clearinghouse for Science, Mathematics, and Environmental Education provided the final copyediting of the manuscript, saving us from many grammatical embarrassments. Thanks, Linda, for your attention to detail.
Thanks, too, to everyone who contributes to the cause as a result of reading this document. Please notice that this work is not protected by copyright, so you may make as many copies as you wish in your efforts to improve science teaching. Let us know how you do, and remember to share the insights that you gain as you attempt change in your spheres of influence. DLH & PR.

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