Tag Archives: #mathmaterials

Number Line, Age 6+

Number Line, Age 6+

How important are number lines? Montessorians know too well the story of Ancient Egyptians who tied knots at equidistance on a rope to measure crops.  This is a form of a number line!   Every day we use number lines when measuring ingredients, length, or driving along a road.  Not only are number lines everywhere, but they […]

Estimation and Rounding, Ages 6-12

Estimation and Rounding

In everyday life, we use estimation and rounding, two skills that help us mentally assess numbers. They can be used to simplify numbers and understand them better, or they can be used to do mental math faster.