WWW - Portal Sites

The New York Times Learning Network 
Daily lesson plans, lesson plan archive on a variety of science subjects.

General Biological Case Studies 
Lesson plans (blood doping in cyclists / ...).

Activities-To-Go 
Activities-To-Go is a place for all science teachers to share innovative, successful teaching strategies and activities to help students learn the concepts and processes of the life sciences.

Biology Lessons for Prospective and Practicing Teachers 
Suggestions for experiments.

The Science Spot 
Links to science sites for educators, lesson plans, teaching ideas, free cliparts, ...

PBS Teacher Source 
Lessons ideas and activities.

Science Mystery 
Fun mystery stories written with excitement on the top, solid science learning underneath. Each story has real mysteries to solve: why did the doctor get sick? How did a disease spread? What happened to the explorers? Put the clues together - reach your conclusion - find out if you're right!

Science Across the World 
Project in which thousands of schools around the World where students are exchanging information, opinions and ideas on a variety of science topics with young people in every continent. Exchanges are possible in several languages. You need to register and you can get a free 6 month trial.

NASA 
Informative science pages from the US government agency.

Biology Online 
Website listing many further links (online science dictionary, biology tutorials, ...).