Google Tone is a great extension that allows you to share links with others. You click the extension, and it shares the website with your students with a tone.
TodaysMeet is a great tool for teachers. It allows you to create a social network for you and your students that can be private or public. As a teacher you have control over the conversations, and you can easily delete if the comment is inappropriate. You can use this for collaborating, parking lot for questions or simply use it as a place to make responses to questions.
