"Using intelligent tutoring systems, virtual laboratories, simulations, and frequent opportunities for assessment and feedback, the Open Learning Initiative (OLI) builds courses that are intended to enact instruction - or, more precisely, to enact the kind of dynamic, flexible, and responsive instruction that fosters learning."
Looks a good resource but looks like its school level.
"The Chemistry Collective is a collection of virtual labs, scenario-based learning activities, and concepts tests which can be incorporated into a variety of teaching approaches as pre-labs, alternatives to textbook homework, and in-class activities for individuals or teams. It is organized by a group of faculty and staff at Carnegie Mellon University for college and high school teachers who are interested in using, assessing, and/or creating engaging online activities for chemistry education"
Great post on risk and the ways in which it can be portrayed. Uses a shockwave interface to allow you to change the way in which 2 health risks are reported.