I am sharing a communication tool that can be used with sports, but could also be used in the classroom. I do a lot of coaching and love this app. You can contact individual students/players/families or the whole class/team. Check out all of the features. It can be used for clubs, classes, teams, etc.
I really have gotten used to using Google Classroom this year. It has worked really well to collaborate with other teachers. The Literacy coach, Science coach, LMS, Tech teacher and the 3rd grade classroom teachers worked together to develop a cross curricular nonfiction/informational text research unit. It was great for us all to work together to post assignments and resources. It really helped us stay organized and not have to meet in person all the time. I love that it is also connected to our (and the student's) district Google accounts. #techinpedagogy400
https://insertlearning.com/