Better Ability to Estimate = Greater Understanding

Whenever I wanted to quickly check for understanding of concepts in my class, I used to ask questions that would have my students quickly estimate the answer. You see, when a student is capable of estimating correctly, chances are that they have a better understanding of the concept. Try it out on your students sometime, those with way off estimates usually need some remedial help.

Here's a handy tutorial on how to round numbers, a great spot to ask for estimations too! Once you think they've grasped rounding the numbers, try the worksheets on rounding.