How many squares are missing?
![R.001.SS447793960](https://multiplicitylab.northwestern.edu/files/2021/03/AR.041.png)
For Teachers
Ask
How many squares are missing?
How did you see it?
How could you figure it out?
Grades
3, 4, 5, 6+
Big Ideas
Extend
After the class has discussed the questions above, you can extend this activity by posing the following questions: