I do have some comments on some particular suggestions, just so that you know they've at least been thought about:
Make it some other time than Monday at 6pm
This is not a bad idea per se, but at what time can you guarantee that first year CHEM/BCHM majors will have free, much less faculty and student guests? In the chemistry department alone, we have 8-11, 12-3 and 3-6 labs, five days a week. Things like Lab After Dark would have to be cancelled outright because no lab space would be available. Originally I had the class scheduled for Monday 7pm, but the only room the University Schedulers could give me [a year ago!] was down in the Business building. I don't think trying to schedule 101 [which is one weekly meeting] will ever work during the 8-6pm time frame. I really don't know which is better, 6pm or later, however.
Make it graded, not CR/NC
I think there is merit in this suggestion, though I'm still unsure. My original vision was a more relaxed setting that allowed students to escape the pressures of being constantly graded, for at least once a week, while still drawing something worthwhile from the course. Several students mentioned this as being a possible source of lack of motivation, something I accept. I perhaps naively thought that learning about the major, interacting with peers, meeting the faculty, becoming part of the departmental community while having some fun needed little coercion. Truthfully, I'm torn on this.
Give more time for Scavenger Hunt
Although I think that two weeks is more than enough time to do this, I also accept that doing it over break hampered this. To my credit, I did think about this, which is why so many categories could have been done at home (parents reading Silberberg, etc). Besides, I have taught long enough to know that if you give students, say, three weeks for an assignment, they blow off the first two and much of the third.
I won't lie: the fact that 91% of my students did not submit even a single picture, even the ones that required no groups, crushed me. I had previously heard stories of faculty sticking their neck out and trying something new with their students only to get completely shut down -- now I know that feeling. Such a vast nonresponse from my class tells me however that ultimately I'm responsible for the outcome. That said, it is highly unlikely I will ever risk making an assignment/game/adventure that could potentially make me feel so shitty again.
Drop the Twitter, make a Facebook group instead
I don't have a Facebook account and I never will. In my opinion, Facebook should remain how it started, for college students only. If you're not a student and don't have an email address from a university/college, you should get kicked out. This means high school students, parents, joe sixpack, and especially faculty [which is just weird anyway]. And the way administrators use it to monitor student behavior, not to mention prospective employers, is particularly reprehensible to me and Facebook is to blame for selling out its audience to grab corporate cash.
Besides, Twitter is the future, and Facebook is so 2005. I still believe, with a willing class, Twitter could be one of the coolest tools in academia.
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I am happy to have met you all and I hope to see you in future courses. If you ever need help and your instructor/advisor isn't available, feel free to swing by (I feel like I know everyone at least a little it -- even you there sitting in your dorm-room, putting off studying). I plan on taking sabbatical next year so unless you plan on visiting me in Moscow or Tashkent, I won't see you next year. Take care!