Remind is a service for sending text messages to your students without having to reveal your real phone number. I've been recommending and using it for years. One of my favorite aspects of Remind is that I can schedule and send messages from my computer and respond to messages from my computer.
In the following video I demonstrate the basics of getting started with Remind to send text messages to students and their parents from your computer.
It should be noted that if your school or school district subscribes to a school-wide paid Remind plan then the process of setting up your classroom and importing students is slightly different. However, the process of sending messages is the same whether you use an individual Remind plan (free) or a school plan.