This model can help students sort out the swirl of controversy around Pluto's stature as a full-fledged planet. The concept of what a planet is , is not so simple anymore. As we discover more about the Solar System, we find a wider variety of objects than we ever imagined. Wrestling with these questions also provides a means to nurture logical reasoning and tolerance of ambiguity.
Students compare attributes in positive and negative examples.
Students generate and test hypotheses. Students state a definition according to essential attributes. Testing Attainment of the Concept Students identify additional unlabeled examples as yes or no. Teacher confirms hypotheses, names concept, and restates definitions according to essential attributes. Students generate examples.