Background: Nature of Science (NOS) is defined to be the epistemology of science, and comprised of distinctive defining aspects. The representation of these NOS aspects in school science textbooks is likely to affect how students understand NOS. Representation of NOS aspects can differ between topics even within the same textbook and these topical…

Helping students understand that the scientific community's claims change through time, sometimes radically, allows them to develop a well-grounded sense of the "nature of science." Learning to reason about how scientific claims come to be accepted, and later refuted, is important for understanding the tentative nature of scientific…