Odd Partners

I was so impressed by the teaching method Hooty's teacher used for teaching them odd and even numbers.

Hooty her self explained to me how she knows to differentiate them.

She said, "Even numbers have partners and odd numbers don't have partners."

And she drew four circles on the white board and showed me how they have 'partners' and said, 'so four is an even number.'

Then she drew five circles and said, 'five is odd because one circle doesn't have a 'partner'."

Isn't it impressive that four year olds can do such things?