(1) Find some small application of elementary physics, perhaps in physiology, energy production or consumption, public health, medicine, etc. It should draw upon only topics we have covered. You should point out how physics applies, and how it clarifies something about this topic in some way, using only the simple kinds of arguments we are learning to make, and it should include a quantitative estimate Don't just find something on the web and appropriate it wholesale, but of course you may use the web as a source of information. You should present just one essential physical idea, clean and clear, and perhaps very approximate, or even speculative -- that would be fine. Write up your idea in a clear exposition of maybe one page. I'll make suggestions when I see it, and we will refine it. Aim to make it something you can present as a 5 minute topic for the class as a whole. The presentation may not use computer projection -- that is, it must be entirely your own exposition. A good presentation will be worth an increment in grade.
(2) Make a comment or raise a question in class that takes us in a new and productive direction. When you think you have done this, write me an email message repeating the remark, and say why you think it was productive. If I agree, I'll file it in my extra credit folder. Two of these should be worth an increment in grade. (But that's the limit -- i.e., you can't go on and on adding increments, much as I want to encourage your questions.) One additional point: be tolerant of your classmates' raising questions! This is the whole point of what we are aiming at, and you can't learn to do it just thinking about it and not actually doing it.