How I Use It
I find this tool to be a great resource for field trips. I can form groups based on the students who are attending, and I can send out messages reminding them to turn in permission slips,and when the bus has arrived. On the trip itself, when we split into small groups, I can send reminders about when and where to regroup or point out specific things on the trip that the students may have missed ("Make sure you ask the docent in the White Sands area to tell you his WWII story.").
Remind 101 is a great tool for communicating with students and parents. I can send reminders about upcoming assignments and events. It allows me to also communicate to small groups and is anonymous.