Teach Computing

Revision notes, activities, lesson plans, teaching ideas, and other resources for GCSE, A-Level, and IB Computer Science teachers and students.

What's New

UK Computing Laws

This video from Computer Science Tutor covers the main UK computing laws re...

Wireless Networking (Wi-Fi, Security, and Hardware)

This video about wireless networking includes everything that is needed for...

Network topology videos

These four excellent videos from Computer Science tutor cover the four ma...

Network protocols

These four videos explain the main networking protocols that students are l...

Embedded Systems video

This short video is a good over of embedded systems, covering the main poin...

Representing Text in Binary

This video clearly explains the two main ways of representing text in binar...

Types of Malware

This video explains the various types of malware including viruses and troj...

Protecting against Malware

Following on from the Types of Malware video, this video explains technique...

Video: Network Security #1

This video gives an overview of the threats to networked computer systems, ...

Resources discount offer

Boolean Algebra

Click here for recommended AQA A-Level Computer Science textbooks. The processor and its components fetch execute cycle The processor instruction set Addressing modes Machine code and assembly language operations

Binary shifts

Binary shifts - arithmetic and logical

This worksheet contains practice questions for performing logical shifts and arthimetic shifts on binary numbers. You can download the worksheet and the answers.

Updated: 2017-12-15 Interrupts Factors affecting processor performance

CPU Performance

Factors Affecting CPU Performance

This video is designed specifically for the Edexcel IGCSE Computer Science syllabus. The CPU's clock speed and its relationship to the fetch-decode-execute cycle is explained. Then cache and multi-core CPUs are examined to explain how they affect the overall speed of a processor. The video is quite heavy on theory, but that is the nature of the topic.

Updated: 2017-11-12