Geogebra is a graph making tool/website. With this, you can create graphs of any kind, and learn how to figure out slope. This tool is great for figuring out things about lines and graphs
For big projects, instead of doing a poster board or presentation, teachers can opt for their students to create blogs with this tool. Weebly is a simple and easy blogging site and with Weebly for education, teachers can quickly create accounts for all their students.
Weebly becomes more than just a blogging site with Weebly for education; teachers can accept homework and keep parents up to date on their child's work.
ESPN sports science shows you an inside scoop on the science in every sport. They show real athletes and sometimes test on them. Like for example they once hyped sugar into a football player to see if it either help or hurt him when he plays.
Use engaging videos on TED-Ed to create customized lessons. You can use, tweak, or completely redo any lesson featured on TED-Ed, or create lessons from scratch based on any video from YouTube.
Diigo is a tool to bookmark websites for students. I found this website quite useful for classrooms to use. It provides you to search groups to join them and start bookmarking.
Free Translation is a great website for anyone trying to understand a language. It gives you thousands of languages to choose from and translate with just one simple click.