This circle you can color when assessing your students. It gives a visual overview of their mathematical skills. The students can also use it as self assessment. I use it in class at the beginning and in the end of a lesson, pointing at the area we are addressing today, and letting the students color as much as they think, they master that area. I urge them to change color every, when they return to an area to fill it out, so you/they/their parents are able to see the progress.
For the circle to contain everything from common core grade 2, the areas are simplified, and it's given that the teacher reads the common core standards as well.
Follow me and I you'll know when I've finished more circles for other grades