Association for Science Education. Lots of resources for science teachers and students. Many useful links and information. An online version of the well-known science journal. Keep up to date with new developments.
Most articles have less 'techno-babble' than other science journals.
Solar System Physics. Some very good information about the solar system. Includes a solar system guide and images from the Hubble space telescope. The chemistry community online. Lots of resources for teachers and students.