The ACC program ended with each student giving a eight-minute presentation and after that a five-minute Q&A session. It was the final exam for all the students. We had presentations covering a variety of topics: nuclear reaction, participatory policy-making, sustainable design, eutrophication, euthanasia, computer worm, Lubarsky's Law of Cybernetic Entomology, etc.
In the final pizza party, I luckily won a prize (as the photo) by answering what "Pittsburgh Left" means: The driver tries to make a left turn before the car coming straight from the opposite direction. The prize was a box of chocolate with the official Carnegie Mellon University seal wrapped on each of the twenty pieces of chocolate.
If raffle was for the students, then roses were for the teachers. In the middle of the party, the teachers received roses from three representative students. I was not expecting this, so I was very touched. I wonder if the teachers felt the same way as I did.
The party ended with all of us taking photos at the newly installed sculpture "Walking to the Sky" -- an ideal location to commence.