On-line Laboratories for Introductory Biology to Enhance Web-based Learning

 

Tested Studies in Laboratory Teaching, 2012, Volume 33

Betty L. Black & Marianne Niedzlek-Feaver

Abstract

The co-authors have developed on-line laboratory exercises for introductory biology that can be used as extensions of wet labs, as lecture-associated homework, or in distance education. Although it is not possible to recreate an entire "wet lab" experience, we have developed a combination of video, simulations, virtual microscopy, and game- like exercises that stress concepts and place students in the role of a working biologist. This presentation illustrates two interactive exercises: one that simulates a field trip to a forest ecosystem, and one that uses the experimental approach to solve a problem in evolutionary ecology. The virtual field trip utilizes an interactive panorama of a forest in the Raleigh area. Students locate habitats within the forest and view linked videos of different plants and animals. To illustrate ecological concepts, students are required to construct a productivity pyramid that places the organisms at the appropriate trophic level. The second exercise uses the application Quandary (Half Baked Software) to provide an interactive "case-study" of natural selection. Students play the role of a biologist in Trinidad and use the scientific method to determine why guppies found in two pools differ in coloration. As the study progresses, students collect data on the guppies and interpret experiments performed both in a laboratory and in the field. They answer questions as the study proceeds to verify their understanding of the material. These exercises may be viewed on our website and are freely available to educators.

Keywords:  scientific method, video, case studies, forest ecology

New Mexico State University (2011)