The second lesson in a unit of 15 introduces pupils to text compression. The class begins with discussing how they already use text compression when sending text messages. Pairs learn more about the subject as they work to compress a poem using an online tool. The pairs then develop their own approach to text compression and share their plan with other groups to use.

Concepts

compression, computer science, computer code, algorithms, technology resources

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Instructional Ideas

• Use a compression program to see how much a file may be compressed
• Have the class take notes during the video, then try to compress the notes

Classroom Considerations

• Be aware that all pupils may not text

Pros

• The decoding handout has an answer key
• The online activity also has an optional activity guide

Cons

• None