Imagine winding the hour hand of a clock back from 3 o’clock to noon. Mathematicians have long known how to describe this rotation as a simple multiplication: A number representing the initial ...

Use Base-Ten diagrams and standard, expanded, and word forms to represent numbers. Warm up with a Mystery Math Mistake as you add two 2-digit numbers using a decomposition strategy. Find Which One ...

Algebra provides the formal framework to describe mathematical structures such as groups, rings and fields, while number theory investigates the properties of integers and their extensions. At their ...

Math is a hierarchical field, building sequentially on prior concepts. Likewise, math standards in each grade presume that ...

Many students in elementary grades struggle to grasp the perennially vexing concept of fractions. If those struggles persist into middle school, it can undermine their ability to master more complex ...

Remember the days when working a math problem resulted in a right or wrong answer, and parents had a basic grasp of how to help their children with math homework? Those days predated the Common Core ...

The calculations behind filling supermarket shelves are dizzyingly complex – but it all starts with the x and y you know from school Nando’s put it succinctly on its Twitter feed last month: “The UK ...