“I can, you know, do math and stuff,” says Harry Potter defensively in Harry Potter and the Sorcerer’s Stone. Math and stuff. I'm sure Professor McGonagall would shudder to hear that. The key shifts in Common Core math are leading students to a deeper understanding of why they do math and what the numbers mean. Here are the key shifts in mathematics and a few baby steps towards achieving them.
https://www.scholastic.com/teachers/blog-posts/meghan-everette/common-core-key-shifts-mathematics/