Here is a great way to find teachers (in your area of teaching) who use twitter for collaboration! You will need to start a twitter account (http://www.twitter.com), but it is easy to setup and start following people. What a great resource!
This includes resources for Pre-K through 12 for all subject areas. You may want to take a look to see what is offered for science and upper grade levels.
You'll find a lot on this site, including a large number of resources, textbook reviews, powerpoint tips, tutorials, templates, resources for multimedia approaches for teaching biology, etc. Be sure to click on the About tab along the top of the page for additional information and the purpose of this bioblog. Great stuff.
This was posted to the Science Teachers group - For those that are not members, here you go! Great resources for chemistry related simulations - also contains some biology related chemical simulations as well (i.e. protein structure)
New Year's brings a time to look back at the year and reflect - this resource is looking back on the top science events in 2008. It's no surprise that CERN's Large Hadron Collider tops the list.
Mr. Noon, a science teacher from upstate NY, has his classes online. Beware - this is a loud website. Watch the Flash animation in the PSP to get to the "Enter" button. He has some cool stuff for his classes and in general. This has resources for a lot of our sciences.