# ALEX Lesson Plan

## Cracking the Code

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This lesson provided by:
 Author: Kathy Perkins System: Tuscaloosa City School: Tuscaloosa City Board Of Education The event this resource created for: ASTA
General Lesson Information
 Lesson Plan ID: 34771 Title: Cracking the Code Overview/Annotation: Codes are used to transmit messages.  We may use codes to keep our messages secret from people who do not know the code, or we may use them to change one type of information into another.  The key to decoding a message is knowing the rule to crack the code.  In this lesson, students will explore different types of codes, create coded messages, and apply rules to decode messages. This lesson provides the background needed for students to then develop their own method for transferring information.This lesson results from a collaboration between the Alabama State Department of Education and ASTA.
Associated Standards and Objectives
Content Standard(s):
 Science SC2015 (2015) Grade: 4 7 ) Develop and use models to show multiple solutions in which patterns are used to transfer information (e.g., using a grid of 1s and 0s representing black and white to send information about a picture, using drums to send coded information through sound waves, using Morse code to send a message).* Unpacked Content Scientific And Engineering Practices:Developing and Using ModelsCrosscutting Concepts: PatternsDisciplinary Core Idea: Waves and Their Applications in Technologies for Information TransferEvidence Of Student Attainment:Students: Develop a model to show multiple solutions in which patterns are used to transfer information. Use a model to show multiple solutions in which patterns are used to transfer information.Teacher Vocabulary:transmit transfer decoded accuracy digitized convert coded signals Knowledge:Students know: About digitized information transfer. (e.g., information can be converted from a sound wave into digital signals such as patterns of 1s and 0s and vice versa; visual or verbal messages can be encoded in patterns of flashes of light to be decoded by someone else across the room). Ways that high-tech devices convert and transmit information. (e.g., cell phones convert sound waves into digital signals, so they can be transmitted long distances, and then converted back into sound waves; a picture or message can be encoded using light signals to transmit the information over a long distance). Information can be transmitted over long distances without significant degradation. High tech devices, such as computers or cell phones, can receive and decode information - convert form to voice - and vice versa.Skills:Students are able to: Generate multiple design solutions that use patterns to transmit a given piece of information. Apply the engineering design process to develop a model to show multiple solutions to transfer information. Describe the given criteria for the design solutions. Describe the given constraints of the design solutions, including the distance over which information is transmitted, safety considerations, and materials available.Understanding:Students understand that: Similarities and differences in the types of patterns used in the solutions to determine whether some ways of transmitting information are more effective than others and addressing the problem.AMSTI Resources:AMSTI Module: Energy and Waves Alabama Alternate Achievement Standards AAS Standard: SCI.AAS.4.7- Identify models that show ways in which patterns are used to transfer information (using drums to send coded information through sound waves, using Morse code to send a message).

Local/National Standards:

Primary Learning Objective(s):

Students will:

• use multiple codes to transmit and decode messages.
• explain the uses of different types of codes.

Students will:

• discuss the development of codes through history.
• use binary and Morse codes to send and receive messages.
• create codes using hand signals and sounds, and use these codes to send and receive messages.
• create images and transmit those images to others using codes.
Preparation Information
 Total Duration: Greater than 120 Minutes Materials and Resources: Binary code handout from Code.org for each studentOptional: Binary code poster (printed on poster maker from binary code handout) 1" x 9" strips of construction paper (one per student)tapemarkers, pencilscopies of p.4 and 5 from CS Unplugged packet for each student; print p. 2 for teacher referencecopies of "Message Received!" recording sheet for each student (See Attachments section.)one copy of "Pictures for Message Received Game" handout for every 6 students; cut into 6 pieces so each student receives one image (See Attachments section.) Technology Resources Needed: computer with Internet connection and projector or interactive whiteboard Background/Preparation: Background information is embedded in the procedures. The following websites also provide good information about codes:
Procedures/Activities: