http://www.worksheetworks.com Worksheets for all subject areas
http://www.lessonplanet.com A virtual curriculum department, at your fingertips, Teacher-reviewed open educational resources, EdTech PD videos & courses, Online community of teachers, Share/store your own resources
https://www.brainpop.com Various activities for all levels and all subject areas
http://interventioncentral.com/ many intervention ideas, both behavior and academic
http://www.teachertube.com/ video resources for the classroom
http://pbskids.org/ many activitiesfor younger students
https://www.youtube.com/ Video resources
http://www.schooltube.com/ video resources for the classroom
http://freeology.com/ various classroom resources
http://www.busyteacherscafe.com/ various classroom resources
http://rubistar.4teachers.org/index.php create rubrics to use in the classroom for any subject
https://www.flocabulary.com/ fun hip hop for math and reading
https://www.teachingchannel.org/ videos and common core resources
http://betterlesson.com/ lesson plan ideas correlated with the new state standards
http://www.online-stopwatch.com/classroom-timers/ fun ways to keep track of time in the classroom
http://www.livebinders.com/welcome/home keep organized binders online
http://www.signupgenius.com/ create a way for parents/colleagues/students to sign up for activities
http://doodle.com/ easy scheduling website
https://www.teacherspayteachers.com/ various free and "at cost" activities for all levels and subject areas
http://www.sharemylesson.com/home.aspx lots of lesson plans for all levels and subjects
https://www.remind.com/ text communication with students and families without using your personal phone number
https://www.pinterest.com/ community sharing of classroom ideas for every topic and need
http://www.how-to-study.com/ study skill help
http://ed.ted.com/ lessons for everyone
http://www.shmoop.com/ homework help