So, the rest of my classes did not comment at all on the blue car slowing down. That seems to be in issue with one class only. But.... there is a consistent mistake on a graph representation. The kids are saying that the blue car is moving at a constant rate and so they are graphing it as a linear line, actually showing the car speeding up as time goes on at a constant rate. The graph is a speed/time graph, but they show the blue car increasing in speed even though they say differently. I am asking them about that, but they are not catching it so at the end of the presentations I will bring that to their attention. I would say this occurs with at least 5 of 7 groups. This really does take
It's ok for students to make some of these mistakes (confusing position-time and speed-time graphs) in their elicitation presentations. They are only sharing their ideas; this is an opportunity for us to get a sense of what they're thinking and the types of mistakes they're making. This confusion is super common and will not likely be "fixed" by any one experience or conversation, but a series of experiences.
ReplyDelete