Class 28 - How to make money on a Blog?

http://www.freetech4teachers.com/

Example

Class 27 - Plixr Editor

https://pixlr.com/editor/

Class 26 - 20% of Google Employees get to work on their own Projects

Google allows its employees to spend 20% of their time working on projects they want to work on

What do you think of this?   Do you think 20-80 would work in classroom?