Teach Computing

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

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Programming languages - from Scratch to machine code

The CS Field Guide has a very comprehensive guide to different types of pro...

Assembly language simulators

There are several assembly language simulators available for use online. Si...

Little Man Computer (LMC)

The Little Man Computer (LMC) is a software simulator of a simple computer ...

Lesson - Data representation - sound

This download contains all lesson resources necessary to teach students how...

Predictive placement

Predictive placement is a feature of some CAD systems that enables more e...

AI to help emergency dispatch phone operators

The Singapore Civil Defence Force (SCDF) may trial an AI system to help tra...

Mobile Data Terminals (MDT)

MDT technology is referenced in the case study booklet, with such systems b...

CAD+911 System

TriTech Software Systems is a company that specialises in Computer Aided Di...

Spillman CAD

Spillman are another company with a range of CAD systems. Their Spillman Fl...

Resources discount offer

Boolean Algebra

Click here for recommended AQA A-Level Computer Science textbooks.

4.7.3.1 The processor and its components

4.7.3.12The fetch execute cycle

4.7.3.3 The processor instruction set

4.7.3.4 Addressing modes

4.7.3.5 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

4.7.3.6 Interrupts

4.7.3.7 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