# CCSS Mathematical Practices

## Why are "Standards for Mathematical Practice" important?

To emphasize the Mathematical Practices, the CCSS gives them their own distinct section, but they are not to be thought of as a separate skill set to be handled in special lessons or supplements. The intent is that these *essential mathematical habits of mind and action* pervade the curriculum and pedagogy of mathematics, K–12, in age-appropriate ways. The pages listed below interpret and illustrate each of the eight Standards for Mathematical Practice as they might appear in grades K–5.

Each article begins with the title of a Standard for Mathematical Practice, as given in the CCSS, followed by part or all of the CCSS description of that standard. Omissions are made only when the original text is an elementary school example that needs no further comment or is explicitly about content that goes beyond elementary school. All omissions are indicated with ellipses (…).

Click below for explanations and illustrations of each standard for elementary school.

- Make sense of problems and persevere in solving them

- Reason abstractly and quantitatively

- Construct viable arguments and critique the reasoning of others

- Model with mathematics

- Use appropriate tools strategically

- Attend to precision

- Look for and make use of structure
- Look for and express regularity in repeated reasoning