Learning about Digital Pictures

Anticipatory Set (Day One):

Take pictures of students or your school and observe them on the computer (use either a digital camera or scan images taken with a conventional camera). Ask students how the picture or information to make the picture got inside the computer. Students should be shown other electronic pictures, such as daily weather satellite images. Tell students that the class is going to learn how electronic information is transferred over the Internet and displayed on computers.

Show students magnified images of their pictures on the computer. Extreme magnification will show that an electronic picture is composed of little squares, called picture elements or pixels. Ask students to examine the image and count the number of pixels wide various features are. For example, how many pixels wide is your face, your nose, your chair, etc.

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Lesson designed by the YPOP Team

For questions about this lesson, please contact Tim Slater