I'm working on a science education project called I2U2, which is looking for teachers like you.
The main idea of the project is to give students (and their teachers) direct access to data from major physics experiments, along with access to grid computing resources so that they can do interesting investigations with those data. We have access to data from the CMS test-beam, as well as Monte Carlo data simulating CMS itself. We will have real data from CMS once the LHC turns on. We have access to environmental data from LIGO, the gravitational wave detection experiment (not the gravitational wave data itself, I'm afraid; but there's still cool things you can do with the seismometers and other sensors). And we have an array of several hundred cosmic ray detectors in place in schools across the US (and a few abroad) from Fermilab's QuarkNet project (http://quarknet.fnal.gov)
All this data can be used for inquiry-driven projects which the students design themselves, with guidance from their teachers and materials we are preparing for the teachers. These 'e-Labs' are not scripted labs (though we do provide a general structure for developing those investigations), they are an opportunity to do real inquiry with real data. And yes, this will include tools to let you track your students' contributions and progress.
We will be doing some teacher workshops this summer, and we need some teachers to be beta testers. If you are interested in that, or in the project in general, check us out at http://www15.i2u2.org/ We are not set up for production yet, so please excuse that it's not very polished, but it should be possible to learn a bit more about the project from that site.