Unit 3. Information and the InternetRevision Date: Jul 21, 2017 (Version 2.1)
Data is stored and transmitted online efficiently using many different kinds of hardware and software to send it quickly and accurately. Data can be compressed to take up less storage room and transmission time and, at the core, the entire system is made up of simple circuits that work with binary information that flows at an incredible speed all around the world.
This flexible lesson offers the teacher the opportunity to reteach key concepts such as binary, abstraction, Internet functionality and also teachers the layers of hardware abstraction from transistors and logic gates up to computing devices.
Journal (5 min)
Review Presentation on Binary and the Internet (20 min) optional
Activity 1: Data compression (10 min)
Activity 2: Presentation on Logic gates and hardware abstractions (20 min)
Wrap Up (5 min)
Assessment can be in class or can be used as homework. (20 min) optional
Student computer usage for this lesson is: required
The Computer Science Field Guide http://csfieldguide.org.nz
Coding and compression: http://csfieldguide.org.nz/en/chapters/coding-compression.html
Data representation: http://csfieldguide.org.nz/en/chapters/data-representation.html
Use the binary number calculator to check conversion calculations
How computer memory works (5:05) http://ed.ted.com/lessons/how-computer-memory-works-kanawat-senanan
Presentations: Unit3Lesson14_InternetData_Presentation, Unit3Lesson14LogicGates_Presentation.
Worksheets: Accompanying student notes to be filled in. Unit3Lesson14_InternetData_StudentHandout, Unit3Lesson14LogicGates_Handout. Also Unit3Lesson14_InternetData_ReviewSection
How does information get from one computing device to another using the Internet? (also on Slide 1 of the Unit3 Lesson14_InternetData_Presentation)
Slides 2-3 review the basic steps to sending information online:
This is a review of unit 3. Pair, share and discuss. Identify weak areas of student understanding.
If students need additional review: provide the handout: Unit3Lesson14_InternetData_ReviewSection (to accompany slides 4-9) and continue with the presentation, otherwise use the handout as an assessment.
Distribute Unit3Lesson14internetData_StudentHandout (slides 10-11) on data compression and abstractions from low level to high level with notes to accompany the video how computer memory works (5:05)
Present Unit3Lesson14_LogicGates_Presentation about hardware abstraction.pptx
Distribute Student handout: Unit3Lesson14LogicGatesHandout.docx
Assessment (20 min) optional or can be used as homework.
Also available Logic Gates additional practice handout and informational article.
More than any other lesson so far, this lesson should be customized to meet the needs of the students. If they have a background in electronics and logic circuits from science or STEM classes, or have a firm grasp of binary number conversion and how the internet works, these sections of the lesson can serve as a very quick review skipping past the slides with extra detail.
For advanced students: Use the Unit3Lesson14 assessment and the Unit 3 Lesson 14 Data on the Internet - Review Section as summative assessments after a brief review.
For students who do not have this background knowledge, use the presentations and notes.
Notes and exercises for binary encoding, data compression, logic circuits, how the internet works and layers of hardware abstraction.
Unit 3 Lesson 14 Summative Assessment
Unit 3 Lesson 14 Data on the Internet - Review Section
can be used as a formative or summative assessment.