Blendspace - Easy to use, and the option to create lessons that students can view at home is a bonus.
Better Lesson - Browse for lesson plans by standard and grade level for math, science and English.
CK-12 - Excellent interactive site with a variety of activities by standards. Mostly for math and science.
The Learning Network - Teaching and learning with the New York Times.
Newsela - Current events, can adjust to student's reading level. Students can take quizzes.
Share My Lesson - Thousands of FREE complete lesson plans for teachers of all subject areas.
Google Classroom - A great place to put assignments, videos, worksheets, discussion board for students. ADDED bonus...most of our students have used Google Classroom (many of our teachers use it)
Google Docs - As we know, great tool for collaboration
Google Hangouts - Another great Google tool that allows you to communicate with a classroom of students at the same time.
Screencastify - Allows you to record, edit and share videos (could put on Google Classroom)
Zoom - Video conferencing tool to connect with students.
Class Hook - a great tool to find fun videos that could be used to introduce new content