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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Examples of Local Cryptocurrencies

Digital Money for Local Communities covers three examples of country-wide c...

Hash function A hash function takes arbitrary sized input data (e.g. a fil...

Cryptocurrencies vs regular currencies

What is Bitcoin and How Does it Work? is a high level overview of the Bitco...

Examples of Cryptocurrencies

Bitcoin is by far the most well known cryptocurrency. The Bitcoin website w...

Practice paper 3 exam questions

One of the drawbacks of the yearly case study is that there are no past p...

Emergency Management System Explainer Video

This short video gives an overview of some EMIS features. It includes many ...

Geographic Information Systems (GIS)

For some functionality, an EMIS may also be connected to a GIS (Geographic ...

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...

Resources discount offer

Logic Gates

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

Logic Lab

Logic Lab is a free online logic circuit simulator featuring many input and output devices, and even a propeller!


Updated: 2015-04-06
AND, OR, NOT gates

Logic gates: AND, OR, NOT

A revision video from Computerphile which covers the three basic logic gates: AND, OR, and NOT. The video includes truth tables, logic gate symbols, and the different notations that are used to denote 'AND' and 'OR'.


Updated: 2015-04-19
Half-Adder

XOR and Half-Adder

This video starts by recapping the truth table for an exclusive-OR (XOR) gate, and then goes on to show how its properties can be used to help create a half-adder in conjunction with an AND gate. The video helps demystify the concept by building up the half-adder and explaining with examples why an additional gate is needed.


Updated: 2015-04-29
Truth table worksheets

Boolean logic worksheet pack

These three Boolean logic worksheets have exam style questions on logic statements and truth tables. There are 22 questions in total, covering AND, OR, and NOT gates. Answer sheets included.
Updated: 2018-05-17