Monthly Archives: September 2016

Odd and even

Odd and even

Amu our youngest boy, soon to be four in a few months, loves numbers…counting forwards and backwards, attempting his brothers word problems and making up ones of his own, he generally seems happy in the world of numbers. This morning I set up the felt board for him and gave him felt numbers to play with. He neatly arranged them from 0 – 10. This was actually a great start for our activity. I then gave him colored tokens and asked him to represent the numbers using tokens (under each felt number). As he started out, I requested him to put the token in pairs. He quickly announced that there would be nothing under zero and moved on to 1 and 2 and so on till 10. Soon each number had pairs of tokens lined up below it in two neat columns.
Amu surveyed his work with a sense of pride. Now I gave him a bunch of big black and white buttons. I asked him to put a black button above every number where a token did not have a pair, and a black button where every token had a pair.
And so we started…white above 1, black above 2. I helped him get started and after he caught on and started putting the buttons all the way to 10.
When he was done, I asked him to look at the black and white buttons and tell me if there was a pattern that he could find. He was quick to say “YES!!!! White, black, white, black, white, black”
So then we looked at the numbers, tokens and buttons and established that 2, 4, 6, 8 and 10 all had tokens with pairs while 1, 3, 5, 7 and 9 did not. Now, taking it a step forward, I asked him what came after 10. “11” he answered promptly.
“So”, I said, “if you continue this pattern, what color button would you get on 11?”
“White” was the answer.
Me: And then, do you think all the tokens under 11 would have a pair?
Amu: Nope!
Me: What about 12?
Amu: That would be a black button…so yes it would have a pair.
That was our mini-lesson to introduce the concept of odd and even. We did not get into the terms at all…this was just a starting point for further discoveries. For a few days I will simply set the felt mat out for him with the numbers and tokens and let him continue this journey before taking it further.
This took all of 10 minutes and was fun for both of us. Amu wants the felt board counting when he gets back from school too!