A website with endless tools and lesson plans for teaching students about digital citizenship as well as ways to incorporate technology into the classroom. Also has tool bank which can be sorted by Common Core standards. https://www.commonsense.org/education/

Pocket is a free tool that can be used to store videos, articles, etc. and then can be used to access these at a later time on a browser or through the app. https://getpocket.com/

Micropoll allows users to create free website polls then publish them on any social media site to share with others. The results can then be analyzed by the creator only or can be shared with poll takers after they complete the poll. http://www.micropoll.com/

Have students build critical thinking skills by creating their own puzzles. Everything from a crossword to magic square to cryptograms! http://www.discoveryeducation.com/free-puzzlemaker/

Desmos is a graphing calculator website and app which students and teachers can use to create, save, and share graphs. There are also many pre-made lessons and investigations for students.
https://www.desmos.com/calculator

EDpuzzle allows you to create and share interactive videos. You can search by topic or key work for EDpuzzles that have already been created by others. You can also create your own EDpuzzle by filtering through videos from YouTube, TED Talk, Vimeo, Khan Academy and many more or by uploading your own. Most useful for teaching because you can add questions and comments throughout the video to highlight the most important aspects for your students while also assessing them. This is especially worth trying if you want to try a flipped classroom or give your students additional resources for them to view outside of the class.

https://edpuzzle.com/