Bachelard and the Philosophy of Education: Focuses on Bachelard's epistemological view of scientific development. Encyclopaedia of the Philosophy of Education article, by James Marshall.
Philosphere Publishers: Gaston Bachelard: Biography and a collection of introductory writings on Bachelard.
The Columbia Encyclopedia, Sixth Edition: Bachelard, Gaston: A very concise article from this 2001 reference work.