Remind.com is an interactive messaging app/site where students, parents, and teachers can send messages and communicate at all times. I send messages to my parents weekly using this app because I don't want all my parents having my personal cellphone number. It makes it easier to send class announcements and text parents.
Study Island is a website that student can go on to complete assignments in ELA, Math, Science, and Social Studies. The website is common core aligned so students can practice skills were are working on in class. Students have unique usernames and passwords they must use to login to the site. Students and teachers can send messages to each other with questions or just have a friendly conversation. I use the website for my 5th graders weekly homework.