Mavis Beacon Teaches Typing
I recommend purchasing the Mavis Beaxon Teaches Typing Kid Version for about $15.
They also offer a free download for older versions.
You will not be disappointed with this product!
http://http://www.mavisbeaconfree.com/2014/11/mavis-beacon-software-versions.html?m=1
Microsoft Excel
At present, I am not sure how many students have access to Excel on their computers.
This link will take you to Excel tutorials if you are interested in learning more, please let me know.
http://www.electricteacher.com/excel-tutorials.htm
How Stuff Works
IT, Boolean Logic, Bits & Bytes, Wirth's Law, Augmented Reality, BIOS, Motherboards, 3D Graphics, Security passcards, Bitcoins, Capacitors, and more.
https://www.howstuffworks.com/