# Category Archives: Sets and Counting

### Flash Cards and Marshmallows: Teaching One-to-One Correspondence

K8 and Bon play with marshmallows (which K8 calls “MATH”) based on the Marshmallow Math book. Continue Reading →

### First Grade Math – Place Value Practice

Using the MathRack, a brand of rekenrek, and some place value cards you can teach comparing numbers and ordering numbers! Continue Reading →

### Teaching Little Ones Math with the Toddler Counting iPhone App

I found this great app to help my iPhone addicted toddler to learn math – instead of having her brain sucked out my mindless videos! Continue Reading →

### Create Your Own Number Path – at Home!

I created a number path at home on my hallway floor. Not only is Daughter able to practice counting with it, but I’m seeing some surprising things from it, too! Continue Reading →

### Counting with Big Numbers

In English, the number 1600 is pronounced two ways. I remembered how difficult this can be to kids when I had to teach it to an ESL adult. Continue Reading →

### The 1-2-3 Song

So many children’s songs are to the tune of Twinkle Twinkle Little Star – now there’s one more – The 1-2-3 Song! Continue Reading →

### How to Teach Subitizing: 1 – 4

Some thoughts on learning and teaching subitizing. Including 17 downloadable 4×6 flashcards that you can use to teach your child to subitize – assess the quantity without counting! Continue Reading →

### Toddlers Begin Counting at the Number 2 (not 1)

Grownups teach kids to count the numbers from 1 to 10, but kids really recognize the number 2 first. They focus on the interesting – and ONE thing isn’t really interesting! Continue Reading →

### Union, Intersection and the Empty Set

Check out this way to see how union and intersection work – using SnackTraps and blocks. Also, how the empty set works with them! Continue Reading →

### Empty Sets – When to Use Curly Brackets

Sets are intuitive – you have a basket and you put stuff in it. But what about the empty basket? How do you write it? And why is that important how you write it? Here’s a hands on example of the empty sets in your kitchen. Continue Reading →