These sites are brand new to me although they have been around awhile. Both offer lessons which can be used to supplement in class presentations of concepts. The sites are LearnZillian and Sophia.
LearnZillian has memberships for teachers and students. It has searches for video lessons of common core standards and strands. The lessons include along with the video, single slides to download and project for student viewing, and commentary from the teacher/writer of the lesson. There are only Math and ELA components since that is also the beginning of the Common Core, but there appear to be lessons from K to 12. You can mark favorites and assign things to students.
LearnZillion is also looking for a few good “men.” Teachers are offered the opportunity to apply for dream team membership.
Sophia is also a place where parents can brush up on skills without having to spend time in a classroom. Then they can not only help, but model what learning should be...a life long adventure.
Did I mention….they’re free?!
Enjoy!