Students will study a process called steganography, in which hidden messages can be coded into pictures. A picture viewed on a computer screen is made up of a series of thousands of dots and bytes, and not every single byte is needed to make the picture. A coded message can easily be hidden in the unused parts of the image.
Before the Activity
Download the attached PDF and look over the Teacher Page.
During the Activity
Discuss the materials from the Student Page with your class.
After the Activity
Encourage students to explore web sites and questions from the Extensions page.