Imaginary numbers
Teaching June 1st. 2006, 10:09pmToday was my first set of tests for the week. I spent the day preparing the tests, adding a few pages of supplimental questions, and studying some Chinese characters while the students took their test.
In one of my classes, the students were expected to know how to write the numbers from one to one hundred without needing help. We had practiced the numbers multiple times, and I had given them a paper I had told them to memorize that helped with the spelling. I taught them when to use hyphens when spelling numbers. They seemed to have a grasp on the entire process, so I was hopeful going into the test.
When we started having the test, it was clear that they hadn’t memorized the numbers well enough. Two of the students asked me if they could use the paper I gave them to answer some of the questions on the test. Since that defeated the point of having them memorize it, I didn’t let them.
I started to grade some of the tests and saw what had happened. They had generally done well on numbers from twenty-one to ninety-nine, where the hyphen is required, but had trouble remembering how to write numbers in the 13-19 range.
One question required them to write the price of a piece of clothing. The item had a price tag of $15.
One student wrote "Ten-Five", which would be how to write the word if you translated it from Korean to English without knowing about how our number system worked. He joined the class late in this term and hasn’t had all the books to study with until last week, so this sort of mistake I’ll accept as being reasonable.
One of the other students in the class had written "onety-five". I asked her what it was that she had written.
She said, "Thirty. Twenty. Onety! Onety-five."
Of course, now it makes perfect sense.
4 Responses to “Imaginary numbers”
Leave a Reply
You must be logged in to post a comment.














June 2nd, 2006 at 3:27 am
I think you over-estimate your students. I know a whole bunch of english people who couldn’t cope with that kind of test……
June 2nd, 2006 at 6:26 am
I like “onety”. Much more consistent. And we wouldn’t have to put up with “teen”agers anymore. Good deal all around.
June 2nd, 2006 at 8:01 am
Considering their age and level, this test was well within reason.
One of my lower level (by age) classes said that only studying the numbers 1-20 was beneath them, and that they wanted to learn more. When I wrote all the numbers by tens up on the board, they wanted to know what the next set of place values were. We eventually went up to a million. If I wrote a number from anywhere in the range of 1 to 9,999,999, they could write it correctly.
These are nine and ten year old students, two or three years younger than the class that made up the imaginary numbers. To ask students just a little bit older to study the same material, but less, seems reasonable to me. The difference between the two is that one class is driven to learn, while the other isn’t focus and simply comes to class to have fun.
June 2nd, 2006 at 10:04 pm
Actually my son who is just over three learnt to count from one to ten very easily. However, one you get above ten he can handle 13 and above but 11 and 12 are “oneteen” and “twoteen”.