Lesson Plan
Code.org

Encoding Color Images

For Teachers 9th - 12th
Color me green. The fourth lesson in a unit of 15 introduces the class to color images and how to encode color images using binary code and hexadecimal numbers — and they will quickly notice that it is easier to code the...
Lesson Plan
Code.org

User Input and Strings

For Teachers 9th - 12th
Pupils learn to apply strings in computer science. They master two new user interface elements and also use string type data to represent ASCII characters. Finally, individuals create an app for Mad Libs in the eighth lesson of the series.
Article
Khan Academy

Khan Academy: How Do Computers Represent Data?

For Students 9th - 10th
Bits and binary data are explained.