MIT's Biology Hypertextbook
- Contains sections on chemistry review, large molecules. cellular biology, enzyme biochemistry, glycolysis and the Krebs cycle and photosynthesis. Includes practice quizzes and tests. Mendelian Genetics Central Dogma Prokaryotic Genetics and Gen
- http://web.mit.edu/esgbio/www/

Online Biology
- Online BC senior biology curriculum. Includes interactive multimedia studyguides, tutorials, and quizzes for each unit studied. Both audio and text feedback as well as scoring provided to student and teacher following the activity.
- http://bio12.com

Nagda's Biochemistry Study Center
- Tutorials and tests on the whole spectrum of biochemistry including biotechnology, by Kusum K. Nagda, Associate Professor at Department of Biochemistry, Government Medical College, Nanded, India.
- http://home.123india.com/nbsc/

Lab Safety Training
- An introductory laboratory training course in the basic principles of biological, chemical, radiological, & physical safety, with immediate responses to quiz questions - from the HHMI & Yale Univ.
- http://www.practicingsafescience.org/

GeneEd, Inc.
- Offers online courses in the life sciences.
- http://www.geneed.com/

Bugnet: Entomology Online
- A college credit entomology course complete with illustrated lecture notes, interactive assignments and evaluations.
- http://gaia.flemingc.on.ca/~pbell/bugnet.htm

The Biology Place
- A membership only site that promises to cover biological concepts with tutorials, demonstrations, and animations
- http://www.biology.com