# Algebra

Patterns and “what if” questions

Eggs

## Eggs

Eggs are inexpensive and come packaged in math.

Things that give me hope

## Things that give me hope

Some great recommendations for mathy fun in person and online, and a lovely book by A.O. Fradkin and A.B. Bishop.

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...

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...

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...

More patterns on the multiplication machine

## More patterns on the multiplication machine

When we left off last week, I had challenged Tabitha to find a pattern on the multiplication machine so that there would be the same number of buttons up as down. This challenge followed up on her sophisticated argument that her down-up-down-up pattern yielded more...

Patterns on the multiplication machine

## Patterns on the multiplication machine

Tabitha (6 years old) has been playing with the multiplication machine off and on for a few months now. We have never once used it for learning multiplication facts, but we have had a ton of math-learning fun with it. Recently, she carefully did...

Multiplication Machine [Product review]

## Multiplication Machine [Product review]

We have in our house a thing called the "Multiplication Machine". It is a flash-cardy sort of thing. The multiplication facts are written on top of a 9x9 array of spring-loaded buttons. You press one and the button pops up, revealing the product. You can buy such a...