I just signed up to send text and email reminders to my students and their parents through Remind101.com. It was so easy! I tested it and it works great! They even give you instructions for the parents!
When you sign up, you get a phone number to text. You are able to create a special code for the message. Otherwise, they give you jumbled letters and numbers. Once parents send the text, a reply message is generated that asks for their full name. When they reply, they are added to my subscriber list on the website. I never have to see their phone number! Safe and easy!