Lesson Day 10-12: Binary

Overview

This lesson introduces the binary number system. Students will compare and convert from a

base 10 (decimal) numbering system to a base 2 (binary) numbering system and

vice versa in the context of topics that are important to computer science. They

will learn how to convert letters of the alphabet to binary numbers.

Lesson Summary

● Students will review how to count using decimal numbers

● Change the base to 2 and try having students explain how it works

● Large Binary Card Demo (students in front of class)

● Binary Number Cards for each student to practice

● Virtual class field trip

● Have students preview Binary Clock and try to figure out how it works.

● Binary worksheets for extended practice

● Show students the Khan Academy Intro to Number Systems and Binary video from YouTube to help explain the difference in decimal and binary counting. (https://www.youtube.com/watch?v=ku4KOFQ-bB4)

● View the web resource to learn to convert letters of the alphabet to binary. (http://www.wikihow.com/Write-Capital-and-Lowercase-Letters-in-Binary)

● Students will write out their own short messages. Then they will exchange messages with an elbow partner. The elbow partner will decode the message. They will do this on notebook paper, and then check their accuracy using the

binary translator website.

CS Content

Students are learning the binary number system and its significance to computers. They will also learn how to convert decimal numbers and letters to binary.

Objectives

Students will be able to:

● Convert decimal numbers (and letters) to binary and vice versa

● Explain why binary numbers are important in computer science

● Encode/Decode a short message using binary

Materials and Prep

● Large Binary Cards

● Small Binary Cards

● Download Binary Clock

Resources

Student Documents

● Worksheets

●

Code Studio

●

Video

● https://www.youtube.com/watch?v=ku4KOFQ-bB4

● http://www.wikihow.com/Write-Capital-and-Lowercase-Letters-in-Binary

● http://www.unit-conversion.info/texttools/convert-text-to-binary/

Assessments

● Turn in completed, decoded messages

● Binary Homework Worksheets

● Follow-up quiz

Notes

●