Classification is a vital science-process skill for all students to master. Understanding dichotomous keys as a means of classification enables students to better comprehend large amounts of information and understand how to organize, compare and contrast, and analyze that information. To biology students, mastering the dichotomous key provides an…

Learning cycle investigations allow science students to model the activities of real scientists. An important step in modeling is data collection, which can present a problem in an astronomy course. The celestial body being studied often is unobservable for various reasons. (Contains 3 figures.)