Wednesday. Sophomore math, eighth period.
While most of Mr. R's classes are co-taught, his eighth period is not, which means that I get to teach it. Woo-hoo!
They just started a unit on geometry. (Back in the day, freshmen took algebra 1, sophomores took geometry, and juniors took algebra 2. Nowadays they've mixed all the topics up and distributed them over the three years differently.) We did a day of definitions (which they should have learned the previous year), and on this day it was time to go over some problems having to do with those definitions.
I showed the kiddos how to set up one of the problems. I gave them some time to try it out. And then I worked it out with them to make sure they knew what they were doing.
As I worked the problem, I got to a point where I had to subtract two numbers. And I paused.
I tell this like a joke, but it's true. I got through calculus just fine, but I stumble when it comes to arithmetic.
I mean, I can add, subtract, multiply, and divide. But not fast, and not well.
Give me an algebra problem, and I have no problem. Geometry is even easier. I took four semesters of calculus in college. I majored in physics. I can do the math. Just not the arithmetic.
I was trying to subtract two numbers in front of the class. It was something like 123 - 15. The mental gymnastics weren't happening. A student helpfully provided me with the 108.
And so, I admitted my problem. I told them, "Seriously, check my arithmetic."
I figure it's better to admit it. They all use calculators, anyway. I'd rather they catch me if I write down the wrong number. If they let me know where I made an error, I can fix it right away, thereby not confusing them with mistakes.
As I proceeded through the page of problems, I made sure to check the key, just in case. I didn't make any major errors. I miswrote a bunch of things (I wrote a 6 when I meant to write an x), but I got the arithmetic mostly right.
Still, I'll never entirely trust myself. It's too easy for me to slip up.
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