Last week we went into the lab to play do an investigation with Sketchpad. The task was to create various polygons, measure the angles in each, and calculate the sum of the interior angles. They were then to formulate a “rule” for the sum of the angles as a function of the number of sides.
Then Sketchpad made a mistake.
“Mrs. B, I know this thing is supposed to be 360. Sketchpad isn’t working.”
I know they’ve “learned” how to name angles in middle school. We talked about it before we went into the lab. Doesn’t matter. I think they think math teachers are just really picky and it doesn’t truly matter.
Then Sketchpad is “wrong”. Then I get to have great discussions with a few individual students.
Then these students get to help those working next to them.
I love Sketchpad.