Ninth graders explain differences between bitmapped images and vector images. They calculate pixels and transpose the raw file size to bits, bytes, and kilobytes. They compare formats for displaying images on a Web page.

Students study the graphic formats for the World Wide Web and download a graphic file. They apply correct HTML format for including pictures in a web page.

Students read about several different media file formats and determine which one is best used in specific situations. They go to different sites and read about the different media formats. Students then answer the questions that are...

Learn how compressed formats such as zip, gzip, or gif images are all based on a method called Ziv-Lempel coding, which turns out to be an interesting exercise in finding patterns in text.

Do you love to listen to your MP3 player while you're exercising, or listen to songs on the Internet? The relatively recent development of MP3 technology has made it possible to take a stack of CD's and store them on a device no bigger...

Practice using lossless text and image compression algorithms and considering what data can be compressed most easily.

Check your understanding of lossy and lossless compression techniques, in this set of free practice questions designed for AP Computer Science Principles students.

Computers represent all data in binary, so all types of files, from text to images to videos, are ultimately sequences of bits. Regardless of whether the bits represent a document or a GIF, computers can use a bit compression technique...

This activity explores how images are displayed, based on the pixel as a building block using data compression. The compression method used in this activity is based on the one used in fax machines, for black and white images.

A collection of free learning activities that teach computer science through games and puzzles that use cards, string, crayons and lots of running around. The activities introduce students to computational thinking through concepts such...

This website, from the University of Edinburgh, provides a lengthy glossary of computer graphics terms written by Olin Lathrop, author of "The Way Computer Graphics Work". This site provides simple definitions of basic terms; no graphics...

This resource provides an excellent set of instructions on how to save files to your hard drive and how to download software, as well as an overview on file formats and extensions.

This tutorial looks at the three common image formats used on the web: GIF, JPEG and PNG. You'll learn how these image formats work, and where to use each type of image in your web pages.

Informative site detailing the use of CD-R technologies. Content includes a focus on the basics of CD-Rs, CD recording tips, multiple sessions CD-R, technical support and more.

Learn how zip files work for storage and transmission of files.