The Common Core State Standards Initiative is an educational initiative from 2010 that details what K–12 students throughout the United States should know in English language arts and mathematics at the conclusion of each school grade.
This website was created by the main creators of the Common Core standards as a way to provide free teaching materials tailored to help students master the skills needed to meet these standards.
This handout from the New York State Education Department explains in detail how the Common Core Standards have shifted the content and methods used by teachers, and offers suggestions for how you can help your student thrive amid these changes.