Earlier, I wrote up some quick and creative math warmups. Since then, I’ve discovered some *incredible* resources for fantastic creativity and discussion in math. Here are four sites you have to check out.

### Open Middle

Open Middle comes from my real-life pal Robert Kaplinsky (among others).

This order of operations example is a favorite of mine. Using the numbers 0-9 (only one time per number), make the largest number possible:

Head over to OpenMiddle.com to see a hint and the solution.

### Visual Patterns

Fawn Nguyen (and company) have put together a delightful resource for noting and generalizing patterns called Visual Patterns. In each case, the first few iterations of a pattern are shown and then students must determine the *43rd iteration*. Here’s one example (from Matt Vaudrey):

How many seats would there be with 43 tables?

Hit up VisualPatterns.org to see the solution, as well as over 200 other patterns.

### Which One Doesn’t Belong?

Mary Bourassa (and friends) have created sets of 4 shapes, numbers, graphs, etc and poses the simple question: which one doesn’t belong. Of course, the catch is that there are arguments for why each item doesn’t belong. Here’s one:

WODB.ca has versions appropriate for kindergarteners all the way up to high school students.

### Would You Rather?

John Stevens shares situations that asks students to wonder *which is better?* Whether they’re picking a credit card or deciding which circumstances lead to more money, kids have to justify their thinking with their math skills. Check out Would You Rather?