Let's listen to some codes. To understand how a modem sends binary numbers over a phone line, class member listen to the codes included in the provided mp3 files, translates the tones to binary numbers and then convert the binary numbers to letters that send a message.

Concepts

binary code, numbers binary, computer code, computers, technology resources

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Instructional Ideas

• Introduce binary numbers to the class before this activity
• Identify the different ways the video sends codes and have groups work on only one method

Classroom Considerations

• Younger learners may find it difficult to find the message in the video

Pros

• The audio methods are a unique way to show binary digits
• Provides the translation from numbers to letters

Cons

• There are no answer keys for the audio files or the video