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  Home > JCE Print > Journal of Chemical Education > Issues > 2001  > September  >
Chemistry Everyday For Everyone
Ob-scertainersTM: A Cooperative Activity on Hypotheses
Ivan A. Shibley Jr.
Department of Chemistry, Penn State Berks-Lehigh Valley College, Reading, PA 19610
Cover
September 2001
Vol. 78 No. 9
p. 1193
Abstract
An Ob-scertainer (Lab-Aids, Inc.) is an opaque, black petri dish with a design molded into the plastic. A metal ball is placed inside each Ob-scertainer and students make hypotheses about the internal shape of the design by any means other than opening the Ob-scertainer. This simple activity on hypothesis-forming provides a group exercise that can be used on the first day of laboratory in an introductory or general chemistry course. Judging from their comments and participation in the activity, students learn about the scientific method while cooperatively engaging in the process of discovery.
More Information
*  Citation
 Shibley, Ivan A., Jr. J. Chem. Educ. 2001 78 1193.
*  Keywords
 Collaborative / Cooperative Learning; Laboratory Instruction; Introductory / High School Chemistry; Teaching/Learning Theory/Practice
*  History
 Created:
Last Updated:		 August 14, 2001
April 14, 2005
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