By allowing students to develop and conduct research on biological or environmental problems they identify themselves, students gain a higher level of understanding and appreciation for science. To this end, teachers should incorporate student-driven research in biology and environmental science classes in lieu of cookbook laboratory activities…

Changes of buoyancy related to temperature of an aluminum block system in water are investigated. Three hypotheses to explain the observed change are developed and tested, and the intellectual processes used in the various steps are noted. (CP)

Authors discuss "the scientific method" and assert that laboratory scientists ask questions but seldom state formal hypotheses to be answered by controlled experiments. Authors suggest that experimental results should not be viewed as fact, and students should not be required to memorize the steps of the scientific method. (PR)

Describes a minicourse on experimental hypotheses. The courses which treats the investigative nature of biology as a major theme, teaches nonrigorous problem-solving and engenders the excitement of self-discovery. Manipulation of variables in relation to controls, the principles of deduction and induction, and their application to selected…