There are some basic properties of whole numbers any 3rd grader can tell you: Each number is represented by a single symbol, and followed by a single successor. Multiplication makes a number bigger; ...

If 3 is greater than 2, then ⅓ must be bigger than ½—right? Wrong. As thousands of students head back to school, many will use exactly that kind of thinking when faced with fractions for the first ...

For many elementary teachers, fractions have traditionally sprung to mind lessons involving pizzas, pies, and chocolate bars, among other varieties of “wholes” that can be shared. But in what many ...