Almost three years ago now, I wrote this blog. It's about what I considered an "old" math teaching tool. Today when teachers have "clickers" and smart-boards and last years calculator is out-dated, I was reminded how quickly things "essential" to the math teacher become obsolete. I was cleaning out my room (planning to retire) and came across a stack of geo-boards, a Linart sphere, and some algebra-tiles, all of which I considered essential at some time in my teaching. None of my students could identify any of them.

History slips away, so if you look around your room and come up with some old tool from the "early days" when you started, take a photo, write a brief description, and send it to me. You with that huge classroom slide-rule from over the chalkboard. Does anyone still use those compasses with a rubber tip and a chalk holder on the other end? Does anyone still use chalk? I'll try to make an "old-timers" math teacher scrapbook.

And now, from the way back teaching file.

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I've been teaching for a while, ok, a long while, and one of the ways I pay back my dues for all the folks who helped me out along the way is by being an associate at T2T, a site hosted by Drexel University where teachers can get questions about teaching answered... so everyone doesn't have to reinvent the wheel.. It's free and if you are lucky, one of the clever associates will answer your question before I get to it, but be warned, if it is about word origins or the history of math teaching, it might fall to me...

On just such an event a few weeks ago, a retired college professor named Sal Anastasio wrote and asked about the teaching machine shown at the top that had been found when a high school closed in New Paltz, New York in the Forties...(Another picture is located here ....

I sent off notes to all my usually clever friends, and eventually one of them turned me on to Ms. Peggy Kidwell, the curator of mathematics at the Smithsonian Museum... now aren't you impressed that the Smithsonian has a curator for Math... I'm impressed. It turns out that this question was right down Ms. Kidwell's alley. She is a co-author of Tools of American Mathematics Teaching, from the Johns Hopkins University Press, which is brand new this year(2008).

Ms. Kidwell wrote, "I have never seen this particular device. It has some similarity to an instrument, patented in 1864, that had a series of rotating slats, with several digits painted on each side of each slat. By rotating the slats and marking off problems with a thread, teachers could provide a wide range of arithmetic problems. The inventor of this “arithmetical frame,” a teacher named Henry K. Bugbee, even provided a written Key which gave answers to the questions."

So not a bad day all in all, I learned a little about the history of math education, and one note struck me as particularly interesting that I found on the Smithsonian's site for the image above. It said, ". It was very popular in Catholic schools in New York State." It seems very strange to me that parochial schools would have been more attracted to a particular type of math teaching machine than public, or other private schools... Guess you really do learn something everyday.