Thanks for all the great comments. Can critical thinking be taught? I'm not sure, but learning environments have been created that put up obstacles to the development of critical thought processes. I agree that the tools are not enough and my main point here is to show that we now have some more tools to help individuals develop into critical thinkers.

The Web offers more places outside of the classroom where students can engage in critical discussions on topics that they're passionate about. For instance, I've had young students make some very insightful comments on my blog. A challenge to all of us is to show how to use these tools and support learners of all ages in becoming critical thinkers. An educated and informed citizenry is our best hope for the future.