Day 7: Board MeetingPosted: September 5, 2013
Today we had our first whiteboard meeting using data students gathered in the Buggy Lab. During period 1 I stumbled upon a great distinction for what students say during a board meeting: Observations vs. Claims. Observations are things like “all the graphs are linear” and “the slopes are all different”, whereas a claim is “a negative slope corresponds to a negative position” or “the intercept is the initial position.” I asked period 2 and 3 to start making observations, and I wrote them on the board as they did. (side note; I have two reasons for doing this. One is to keep track of what is said, but the other is to purposefully stay out of the conversation. They don’t look at me when I’m just writing on the board.) Then as soon as someone made a claim (I hadn’t made that distinction yet) I said “whoa, wait a minute. That sounds like a claim to me. Can someone re-state it? OK, now that we have a claim. take a look at your data and see if it matches that claim”. In first period we had one person claim that the sign of the slope corresponded to the positive or negative side of the origin, but when the groups checked it out they quickly dismissed it, and replaced it with the claim that the sign of the slope indicated the direction of motion. Goosebumps.
Addendum: I mentioned yesterday that I would address the groups that crossed the origin with their data, but it didn’t come up in conversation so I decided to wait for whiteboarding worksheets to address it. I did, however, love that they noticed that negative position was different than moving in the negative direction.