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

CommandPoint CAD

CommandPoint by Northrop Grumman offers a range of CAD systems for various ...

CAD+911 System

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

London Ambulance CAD failure

The 1992 London Ambulance Service CAD failure is probably the most notoriou...

Washington State 911 Failure

A 911 emergency telephone system in Washington State and Oregon shut down f...

London ambulance failure (2017)

A 2017 failure of a London ambulance dispatch system is believed to have le...

Computer Aided Dispatch outage

A 911 system failure left emergency calls unanswered and is said to have co...

Load balancing videos

This short article and the associated video explain 5 load balancing algori...

Intergraph Computer-Aided Dispatch (I/CAD

Intergraph Computer-Aided Dispatch (I/CAD) is a system offering many of the...

Boolean logic worksheet pack

These three Boolean logic worksheets have exam style questions on logic sta...

Resources discount offer

6.1 Resource Management

Click here for recommended IB Computer Science textbooks.

System Resources

6.1.1 Resources that need to be managed

Computer hardware worksheet

Worksheet: Hardware roles

To help Computer Science students understand hardware, resource allocation, and resource management, it is helpful to have them first understand the roles each component plays in a computer system. This simple worksheet covers the key resources in a computer system, with space for examples, relevant units, and a brief description of the component's role. It is useful from early topics in GCSE Computer Courses up to the IB Computer Science HL topic Resource Management.

Download the worksheet


Updated: 2017-10-17

6.1.2 Available resources

Supercomputers vs mainframes

Supercomputers and Mainframes

Supercomputers and What are Mainframes? are two short videos that clarify these oft confused terms. The presenter can be a little annoying at times, but the key information is useful.

Understanding the different types of computers helps CS students get a better understanding of the levels of resources available, as well as their effect on overall computer 'power'.


Updated: 2017-10-17
Computer specifications

Worksheet: Computer systems and resources

This activity is designed to help students complete the objective "Evaluate the resources available in a variety of computer systems". The worksheet is a simple table covering the most common types of computer systems available, including those mentioned on the IB Computer Science syllabus. As the specifications of computers change so rapidly, this is a good introduction activity.

To help students find specifications for consumer electronics, I often recommend they use a site such as Amazon.com, which involves a lot of details in its specifications. Top 500 maintains a list of the most powerful supercomputers at any time - a scroll down the list reveals technical specs for each one.Inside Six of the Newest Top 20 Supercomputers is another great resource. What's particularly useful is its explanations of each computer's role. Inside the Titan Supercomputer is a close-up look at a machine boasting 299,000 processing cores!

Download the worksheet


Updated: 2017-10-17

6.1.3 Limitations of resources

6.1.4 Limitations of resources

Role of the Operating System

6.1.5 Managing memory, hardware, peripherals

Operating systems video

Video: Operating Systems: Crash Course Computer Science

A thorough overview of operating systems, the reason we need them, and the types of tasks they perform. Some of the technical language is dropped in without explanation and will probably go over the heads of GCSE students at first, but it is worth sticking with because the level of detail is good.


Updated: 2018-01-11
Operating systems notes

Operating Systems Theory

This page contains notes on operating systems, memory management, hardware management, and user interfaces. The level of detail is perfect for GCSE courses, but also useful as an introduction to operating systems for A-Level and IB courses.


Updated: 2018-01-11
BBC Bitesize operating systems

BBC Bitesize: Operating Systems

This is the better of the two BBC pages on operating systems, covering the functions of an OS in much more detail and with much clearer explanations. There are clear notes and diagrams covering CPU management, memory management, and peripheral management.


Updated: 2018-01-11
BBC Bitesize operating systems

Operating system functions

This page provides a brief over of general operating system functions. The second page then goes into more detail about the different types of process management, including multi-programming, batch processing, and multi-user access.


Updated: 2018-01-11

Note: The IB syllabus does not include a section 6.1.6. This appears to be an error.

6.1.7 OS Resource management techniques

Interrupts and Polling

Polling and Interrupts

An overview of how the CPU services peripherals and other hardware using interrupts and polling. The notes show the advantages and disadvantages of each approach.


Updated: 2018-01-11

6.1.8 Dedicated Operating Systems

6.1.9 Hiding complexity