9 and 10 years old

Nine and ten-year-olds are using math to do stuff. They’ll design a brand new pattern the world has never seen, and then devise a scheme to beat you at cards.

Cookies under constraints

Cookies under constraints

A propos of nothing one day, I ask Griffin (9 years old at the time, finishing up fourth grade) a question. Me: Griff, imagine you are baking cookies and you need $latex \frac{3}{4}$ cup of sugar, but you only have a $latex \frac{1}{2}$ cup measure. How would...

Dots!

Dots!

The New York Times published an article about Common Core homework this week. As is going to be the case with a news article (in contrast to say, a post on a blog dedicated to children's mathematical ideas), one can't really learn any mathematics from the...

Griffin in front of huge walleye statue
Nights of Camping

Nights of Camping

The following conversation took place in the run-up to our annual summer camping trip recently. Rachel has no interest in camping, so this ritual is all mine. I started the little ones young with a one-night trip within an hour from home so that we could come home...

Hints at Holiday

Hints at Holiday

I told an abbreviated version of the following story on my math-teacher blog, where I used it to drive home a point to my colleagues. This version is for parents. --- My wife had been out of town for several days. I was tired of doing all the cooking and dishes. It...

8 + 4 = x + 5
The equal sign

The equal sign

It has been a long, busy semester for me in my community college work. Many interesting and productive projects, lots of interesting and challenging teaching problems. But I am tired. Wiped out and exhausted. So I devised a plan the other evening when Tabitha...

Spirals

Spirals

A few weeks back, this short cryptic video came to my attention thanks to the magic of Twitter. https://vine.co/v/MMEJuOXYndP Thanks to kids connect (@KinderFynes on Twitter) For more than a year now, I have been posting links and other short bits on Twitter using...

Midnight on clock face
Bedtime

Bedtime

In the thick of the holiday season last month, Griffin (9) turned his attention to the mythical midnight on New Year's Eve. Griffin (9 years old): Can we stay up until midnight on New Year's Eve? It is a nice touch that he includes his sister in this request. They...