Density

Wolfson:

 * On the spur of the moment we decided to email them their usename and password for quia. Then we took them to the computer courtyard so they would retrieve their password, log in to quia, do the survey, tutorial, and quiz. People work at different paces and some needed some help in navigating the system. A few finished, others had to finish their work later. (This was a good idea)
 * When they came back to the class we took the class pre-test.
 * When we tried the full size cardbard cube I found out that the cardboard we were using was not thick enough, The cube deformed and we got bad density values. The reason I did not find out is that I had only done a smaller cube before, Witth the smaller cube the cardboard does not have to be very thick. I also realized that the sugar compacted very easily giving different densities depending on the amount of compaction. So I made up a procedure to ensure uniformity. You allow the sugar to "rain" down softly into the cube until the cube overflows, then you run the ruler horizontally over the top of the cube to get rid of the excess.
 * We found out the the certain of our groups are very slow, creating a problem in getting to the group discussions. We are going to have to change groups around to ensure we do not get a group in which all the workers are slow.
 * We only got as far as the denstiy calculation and the statistics and the result interval. The results came out very good. One high result, one low result and the others relatively close to each other. We were very close to the value given in one website.
 * One group did the small box on their own, We did not test it or use it in any way. They did it on their own becuase they finished early. The made the box 5x5x5 cm. We told them not to do the post lab quiz, instead we gave them two sheets of thick paper and told them to bring the half volume box next Friday.
 * I added a post lab survey.
 * Encarni and I were very satisfied with the results.