Dear Estimators,

For most of the math we do in everyday life, close enough is good enough. When we’re figuring distance or how long something will take or how much groceries will cost at the store, we estimate. That’s because we don’t have the time or tools to figure more precisely and also because sometimes there are so many variables that a perfect reckoning is impossible. There may be times in your life when accuracy is more important–if you’re building a bridge for instance–but usually close enough is good enough.

But estimating is far different from guessing. And estimating is hard work. In many cases, estimating takes more brain work than even finding the most accurate possible because you have to make so many decisions and account for so many variables. You have to think about what unit is best, what method you will use, how close is close enough, and if your final estimate seems reasonable. You also have to think about what “reasonable” would be! Making reasonable estimates is one of the most important skills you’ll learn this year.

Happy estimating,

Mr. Heimbuck