### Finding Associations #Desmosify

*Welcome to a series of posts sharing how we #Desmosify the curriculum from Open Up Resources/Illustrative Mathematics. You can use this lesson for free, or sign up to get many more activities just like it in our core middle school curriculum!*

Here’s how we #Desmosified an Open Up Resources/IM lesson to help students **find associations in data.**.

### Desmosification #1: Estimate, then calculate.

Two-way tables are a powerful way to represent data from the world. Associations that were invisible in a one-way table suddenly pop to the surface under the bright light of the two-way table, like the association between gender, age, and survival on the Titanic.

At Desmos, we try as often as possible to start with a student’s concrete and contextual knowledge before inviting them to develop more abstract and mathematical knowledge. Once a curriculum digests a context into numbers, certain contextual questions like “what do you think?” become harder to ask. So we chose to start this investigation *without* numbers, inviting as much contextual thinking from students as possible.

An advantage of the digital medium over print is that we can always *add* the numbers later.