Here is a list of the email codes to text to nearly every cell phone provider. It won't be long before teachers are texting students with homework and study updates. This concept has been around for a while, but it is being underutilized by schools.
Here are the codes for the 4 major providers to get you started.
10-digit phone email@example.com
10-digit phone firstname.lastname@example.org
10-digit phone email@example.com
10-digit phone firstname.lastname@example.org
At the very least, you can use it to keep up with your texting friends.