Many students of chemistry demonstrate alternative conceptions about some fundamental aspects of chemistry. Suggests that research evidence provides strong support for this view. Contains 45 references. (DDR)

Presents findings from a case study into the development of student understanding of chemical bonding. Reveals significant progression in student understanding but also highlights issues of how such progression should be addressed. Emphasizes factors associated with blocks to appropriate concept development. (33 references) (Author/MKR)