Describes an approach to teaching that involves the use of open-ended lab investigations and evaluates students using that same approach. Argues for the use of the rubric in evaluating student performance during experimentation. (DDR)

Most science teachers are amazed when grading tests and quizzes, often wondering how and why students have reached a conclusion, particularly when students fail to provide a detailed account of their logic. Ideally, a variety of assessments should be used to identify alternate student conceptions or gaps in understanding, particularly when…