# Tag Archives: combinatorics

## A math-inspired poem

It’s hard for me to believe, but this is post #100 on this blog!  For that reason, I decided to post something different and wacky – a poem!  Can you spot the math in it? This tale is of a … Continue reading

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## Fun With Multiplication?

For the past few weeks in class, we have been exploring multiplication.  A few months ago, we had learned about and practiced skip counting, so this time around we started by discussing why this might not always be practical or … Continue reading

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## Does order matter?

When you get dressed in the morning, does it matter in which order you put on your pants and your shirt?  What about your socks and your shoes?  Which articles of clothing cannot be put on first?  What about last? … Continue reading

## Counting Rectangles

This week we continued playing with rectangles, but this time we were counting them.  This can be more tricky than it sounds.  I started the lesson by drawing a single rectangle on the board.  The kids all agreed that there … Continue reading

## Building Towers

The first half of today’s lesson consisted of building towers out of colorful blocks.  It began with me building a tower and asking the girls some questions about the order in which the blocks could be placed.  Could I have … Continue reading

## Take One or Take Two?

A few days ago I played the following version of a classic two person take-away game with Katie: There are n chips (we started with 5 :-).  On your turn you can take one or two of them.  Whoever takes … Continue reading

## Routes, Colorful Shapes, and Tournaments

This week’s lesson with the girls began with some basic combinatorics.  I told them that I needed their help in solving a ‘real life’ problem.  This seemed to catch their attention a bit quicker than usual. Problem: On some days … Continue reading

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Earlier this week I noticed that Katie was scrambling the letters in her name for fun.  This seemed to me like a perfect excuse to do some combinatorics with her. Me: Lets see how many different “words” we can make … Continue reading

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## Another lesson, another story: Counting outfits and classifying quadrilaterals

This Wednesday’s lesson was a bit chaotic and unfortunately I do not have any pictures from it.  The girls were both hyper and cranky, and it was hard to keep their attention for more than five consecutive minutes; after that … Continue reading

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Here is the continuation of the account of my lesson with Katie and Varya on Wednesday.  This part was after the girls had their two minutes of going crazy, so it was a lot calmer.  I brought out one of … Continue reading

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