From fractions and decimals to distance and time, the humble-but-versatile number line can deepen students’ understanding of ...

Tape measures. Rulers. Graphs. The gas gauge in your car, and the icon on your favorite digital device showing battery power. The number line and its cousins -- notations that map numbers onto space ...

Neuroscientists discover brain processes which lead to the concept of “zero” on the number line. Zero is a magic number. It stands for emptiness, for nothing -- and yet it is considered one of the ...

When you estimate a number you decide approximately, or roughly, how big that number is. To estimate accurately, you need to have a good understanding of the value and order of numbers. A number line ...