Suppose I were to offer you a fantastic word processor, small, portable, battery free, readily available, capable of operating in any language, and easily used by people from ages one to one hundred. There is such a word processor. It is called a pencil.

Now, suppose I were to offer you a personal computer so powerful that it could be used for any number of tasks and is portable and user friendly. And nearly every one of your students already has one, so you don't even have to supply them. It's the cell phone! It is the most pervasive computer in the world.

Most teachers are well aware of cell phones -- mostly as a nuisance in class, where educators spend a lot of time taking them away from students. Well, you wouldn't take their pencils away, so why confiscate cell phones? Instead of taking them away, I started leveraging them as tools for my classes.

The cell phone may be used as a computation device, a camera, a text-messaging device, a portable storage device, a music player, a word processor, and probably more. Why on earth would I take that from my students? Besides, as you probably already know, it's a losing battle, so why fight it?

Of my 150 students, about two-thirds have a cell phone. I have their numbers, and they have mine. If students are habitually late to school, I give them a wake-up call. If students are absent, I send text messages to ask where they are. If students have a problem they need help with, they get in touch with me directly. I remind them of upcoming assignments, and other teachers sometimes ask me to get in touch with students of mine who also attend a class of theirs.

The obvious objection from teachers is that cells phones are a distraction in class, but in my day, I doodled with a pencil. You know -- that other word processor.