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Great resource if you have students needing makeup or home-bound. Virtual Chemistry Experiments are a collection of interative web-based chemistry tutorials. The tutorials employ Physlets and Chemistry Applets to simulate experiments or depict molecular and atomic structure. The guiding concept is to involve the read in making observations and acquiring data, and then using this information to draw conclusions and infer chemical principles.

I find these are best as additional to traditional lab experiences or, as I posted earlier, I use these for the students that can't be at school for usual labs. Understanding limitations of their own lab technique and evaluation of errors does not occur with simulations. Similar to difference between multiple choice assessment and free response.

I agree with Anna, virtual experiments wouldn't be my first choice in methodology for lab experiments, but there are somethings that you just, can't do in the classroom. Whether it is from limited resources, limited class time, or simply the experiment is too dangerous for the classroom, virtual experiments are a good alternative. I had a chemistry professor in my undergrad who was making a dvd textbook with lectures and experiments and there was a lot of cool experiments on the dvd that he would have never been able to do during his lectures.

testing for macromolecules - happy meal

I use this same lab to identify macromolecules. However, I use products from the grocery store such as apple juice, egg whites, and cooking oil. We even allow the students to bring different items in order to make it a more inquiry based lab.

great resource for labs (mostly bio/life science related)

A I just read an article about an innovation that will be awesome for military and national security. This invention will guide bullets, using lasers, to targets at a distance of almost 2 km. I know this isn't education related, but the students of today will be developing the innovations of tomorrow. I'm sure this bullet technology was engineered with a wealth of mathematics, physics, and earth space R&D.

excellent resources