Cookies and math tend to go together in an elementary school classroom. And not always as reward for a correct answer. Teachers use them as conceptual props to explain an operation like division. It ...

Sean Nank is a math expert who is helping teachers to implement the Common Core standards. He’s a professor at the American College of Education, created in 2005 to provide online graduate programs ...

Compare and contrast these two assignments. Both target an 8th grade standard on seeing structure in an expression and being able to represent that expression in different ways. Which do you suppose ...