|Re: This is it!|
Message #43 Posted by Don Shepherd on 16 Mar 2011, 4:01 p.m.,
in response to message #42 by bill platt
Bill, my wife tells me I'm getting old and grumpy too, so you're in good company!
Here is an example of how technology might be used to give students a better understanding of a math concept, rather than chalk. By the way, the school I teach at only a couple of weeks ago replaced the old chalk blackboards with white dry-erase boards. I'm sure we were the last school in Louisville to do so.
The graph is of the quadratic equation ax2+bx+c. At the upper left hand corner are 3 "sliders" which lets the students dynamically change the values of variables a, b, and c, and observe how the characteristics of the graph change at the same time. Now, you could draw a graph on the blackboard and tell the kids how the graph would change if you changed a, b, and c, and I'm sure they would believe it (especially if you made them draw another graph), but seeing it change electronically before their eyes, direcly from their inputs, possibly makes the learning more interesting and, hopefully, permanent.
I didn't use the handheld NSpire to do this example, I used the teacher PC software because using the mouse is a lot easier than using either the clickpad or touchpad on the actual handheld.
But that's the general idea. Seeing a graph dynamically change might cause some kids to understand the relationship between a, b, and c and the final graph a little easier.
I don't use the NSpire in my classes because my school doesn't have them, but from the nspire google forum I see that several teachers have created very nice NSpire applications, and I think these have value.