There are a couple of resources I utilize a lot with my students. One is a school Twitter page where students can find homework assignments, helpful links, and even participate in class when appropriate. I find that using the Twitter page to ask a "Daily Research" question helps students to utilize their research skills and stay up-do-date on their abilities to find reliable research.
Additionally, I use YouTube in my classroom very often. For example, while sharing Digital Citizenship guidelines with my students from the Elk Grove video:
https://www.youtube.com/watch?v=GitRYnWTNCo. We utilized YouTube to watch the Elk Grove video, then, the students found their own digital citizenship video to share with the class.