Instructors are constantly baffled by the fact that two students who are sitting in the same class, who have access to the same materials, can come to understand a particular chemistry concept differently. Variation theory offers a theoretical framework from which to explore possible variations in experience and the resulting differences in…

Despite several decades of research into the teaching and learning of Science/Chemistry, at both secondary and tertiary level, it has had relatively little impact on practice. In many countries interest in studying Science at school and university is falling, and there is concern over falling numbers and falling standards. There is a changing…