Just type in a word and watch an entire word association tree pop up on screen. It includes definitions, synonyms, and related words. Each part of the tree can be clicked on to see even more expanded meanings behind those terms as well.
Use this site to create online voice recordings. This is a perfect way to get content from your students without them having to always write information down. They can talk, sing, or even par their comprehension of the content and save their file and send it to you to grade later.
This is a 3 day 80 minute block or 4 day 60 minute block Google Trek. It is designed for each student to have their own computer. It has the students analyze Alfred Wagener's evidence for continental drift and explain what his theory was.