Class Dojo
https://www.classdojo.com/
ClassDojo is a communication app for the classroom. It connects teachers, parents, and students who use it to share photos, videos, and messages through the school day. They use ClassDojo to work together as a team, share in the classroom experience, and bring big ideas to life in their classrooms and homes.
https://www.pinterest.com/
Pinterest is the world’s catalog of ideas. Once you've become a member, you can type in ideas that you are looking for and find tons of boards posted in that category. I use pinterest all of the time to get craft ideas for my kindergarteners, bulletin board ideas, and find other fun activities.
Teachers Pay Teachers
https://www.teacherspayteachers.com/
Teachers Pay Teachers (or TpT, ) is a huge community of educators who come together to share their work, their insights, and their inspiration with each other. They are the first and largest open marketplace where teachers share, sell, and buy original educational resources. I have enjoyed the materials and resources that I have gained from this sight.