Want a Free way to text your students (or parents) and not have to give out your cell number or store all their cell numbers in your phone? Try www.remind101.com
When you sign up (for free) you will create a class (don't worry you can build more later...).
They will generate this screen for you so that you can share it with your students...They will send a text message to the number provided with the message shown...heck, why don't you just sign up to get my text blasts using the screen shot above!
Then, back in your "home" area, text away!
Cool and Free and Safe!
There is an app now too!