Binary Code: The Language of Computers! Mrs. Namendorf Grade 4 ESL Technology Lesson

Content Objectives: Language Objectives: Students will be able to… Use Binary code to write a message. Change base 10 system numbers to Binary numbers Language Objectives: Students will be able to… Define Binary code Discuss Binary code with a partner Read aloud their written message

Standards: WIDA Standards: NJCCCS Technology: WIDA 4-5 Standard 3: Mathematics Language. NJCCCS Technology: 8.2.4.G.2 Explain the functions of a system and subsystems.

-nary Bi- What does Binary mean? Means 2 For example Bi- cycle (it has 2 wheels) Bi-noculars (it has two lenses The dictionary tells us that nary means “not one.” Therefore Binary means two, not 1

The language the computers use What is Binary? Binary is… The language the computers use A number system

The binary system uses only two symbols, a 0 and a 1 1 1 = on 0 = off

Bit… The Binary Code assigns one of two numbers to each state a switch on a memory chip happens to be in. If the switch is “ON,” it is assigned a “1.” If it is “OFF,” it is assigned a “0.” Each “1” or “0” is called a “bit.”

You can only have the numbers 0 or 1 If you had a number 0, that would mean… If you had a number 1, that would mean… It is on It is off

Byte… Every letter, every number, every color, everything you type on your keyboard is assigned a series of “1”s and “0”s by your computer. Each series of bits is called a “byte.”

How to count in Binary? 23 8 22 4 21 2 20 1 Decimal Count Decimal Value 0+0+0+0 0+0+0+1 0+0+2+0 0+0+2+1 3 0+4+0+0 0+4+0+1 5 0+4+2+0 6 0+4+2+1 7 8+0+0+0 8+0+0+1 9 8+0+2+0 10 8+0+2+1 11 8+4+0+0 12

Review Time! Answers Binary Code What is the language of computers called? Binary Code What are the two numbers in Binary Code? 0 and 1 What does “0” mean? OFF What does “1” mean? ON

How does your computer use this? If you type an “a” on your keyboard, the computer assigns it the series 00001. A “b” is 00010. A “j” is 01010 and so on through the whole alphabet. I will now give out a handout to help express letters on a keyboard to the computer.

Assignment First, try to write your name in Binary Code. Show your partner and see if they can follow how you wrote your name. If they can, you are ready for part 2. Next, work with your partner to write a short message about binary code. For example Binary is so much fun 00010 01001 01110 00001 10010 11001 01001 10011 10011 01111 01101 10101 00011 01000 00110 10101 01110 Please put one word per line!

References Binary pictures taken from Google search engine on 6/5/2012 from following sites: Picture on slide 3 was retrieved from http://austintoft.blogspot.com Picture on slide 4 was retrieved from http://www.123rf.com/photo_8882852_3d-switch-on-and-off.html Picture on slide 7 was retrieved from http://uowresearch.wordpress.com Picture on slide 9 was retrieved from http://dreamstime.com Binary Simplified Code sheet and Counting Guide taken modified from following source Binary code. (2011, December 20). Retrieved from http://www.micron.com/~/media/Documents/General/K12/binary_coding.pdf