One of the applications I use a lot in my Calculus class is Classroom Presenter (CP3) from the University of Washington. While my teaching style is not typically lecture oriented, because of the time constraints (I have to do PreCalculus & AP Calculus from September->April) it's a pretty teacher-centric class. To make it a bit more interactive, I use CP3. CP3 takes your powerpoint lecture and makes it interactive with the students. While you have control over the projected image, the students can simultaneously mark up on their tablet their version of what is being projected. You can also ask them to submit their marked-up screens back to you. So, when you ask a question to the class, they can write their solutions, you can collect them all and then project the various solutions and discuss them. How does it work? Well, it starts with a Powerpoint. I make it up to include the structure of the lecture, each slide with an idea or a question or a link or a multiple-choi...
...not something ready-made, but something in continuous formation through choice of action. J. Dewey