Searchable collection of peer-reviewed educational resources. You can limit your retrieval to the free resources. Browse by subject, resource type or audience level. Contains over 15,000 resources, many of which are free.
Started in 1999 by the AAAS and 11 other societies and collaboratives, is is now the National Science Digital Library (NSDL) Pathway for biological sciences education. Resources have been reviewed by the individual societies for standards of quality and accuracy.
The tour include segments featuring an exploration of current genomic research in a pathogenic bacteria and an animated explanation of the chemistry of cycle sequencing. It was created by Professor Sarah C.R. Elgin at Washington University.