Computer Science

Each of the videos below are between 5 & 9 minutes long.

Following them are links to Google Classroom resources to help with reading and reconstructing.

A PDF copy of all the links is available at the bottom of the page.

Paper 2 - Computing Concepts (8525/2)

AQA GCSE SLR13 Number bases
In this video we provide an introduction to the three different base number systems you need to know about, these include: Decimal (base-10), Binary (base-2) and Hexadecimal (base-16).

AQA GCSE SLR13 Converting between decimal and 8 bit binaryIn this video we explain how to convert between the base ten decimal number system that we are familiar with as humans, and the base two binary system that computers use. This explains how computers store unsigned integers.

AQA GCSE SLR13 Units
In this video we explain why computers use binary to store data. The difference between a bit, nibble, byte, kilobyte, megabyte, gigabyte, terabyte and petabyte is explained. These are known as measurements of capacity, or how much data can be stored either in memory or on secondary storage devices.

AQA GCSE (8525) SLR13 Adding three 8-bit binary integers

AQA GCSE (8525) SLR13 Representing characters and character sets

AQA GCSE (8525) SLR13 Representing images

AQA GCSE (8525) SLR13 Representing sound

AQA GCSE (8525) SLR13 Compression - Huffman coding

AQA GCSE (8525) SLR13 Compression - Run length encoding

AQA GCSE (8525) SLR11 Introduction to logic gates and logic circuits

GCSE AQA SLR11 Combining Boolean operators to create Boolean expressionsThis video takes a look at how we can represent logic circuits as Boolean expressions and vice-versa

AQA GCSE (8525) SLR11 Applying logical operators in truth tables to solve problems

AQA GCSE SLR6 The purpose and functionality of system softwareThis video takes a deeper look at vitial piece of system software, the operating system. We take a look at why it is needed and its common functions.

AQA GCSE (8525) SLR5 Utility system software

AQA GCSE SLR12 Characteristics and purpose of different levels of programming languageIn this video we take a brief look at the history of programming. We examine the differences between low level languages such as Assembly, and high level languages such as Python. We consider the uses of each of these different types of languages.

AQA GCSE (8525) SLR1 Von Neumann architecture

AQA GCSE (8525) SLR2 RAM & ROM

AQA GCSE (8525) SLR2 Common types of storage

AQA GCSE (8525) SLR3 Types of networks

AQA GCSE (8525) SLR4 Cyber Security and cyber security threats

AQA GCSE SLR5 Cyber Security and cyber security threatsThis video starts with an explanation of cyber security and then follows up with explaining some of the cyber security threats you need to be aware of for your exam.

AQA GCSE (8525) SLR4 Social engineering threats

AQA GCSE (8525) SLR14 Relational database concepts

AQA GCSE (8525) SLR14 The use of SQL to insert, update, delete data in a relational database

AQA GCSE (8525) SLR14 The use of SQL to search for data from a relational database

GCSE AQA SLR6 Ethical, legal & environmental concernsThis video introduces a range of concerns surrounding computing technologies. The idea that new technologies bring with them new social and ethical issues, and that the law is often slow to catch-up to guard people against these issues. Some of the benefits of new technologies are briefly introduced, together with a simple case study on whether the internet should be regulated. The video poses a range of ethical issues that students might consider.

AQA GCSE SLR7 Impacts and risks of digital technology on societyThis video introduces a range of concerns surrounding computing technologies. The idea that new technologies bring with them new social and ethical issues, and that the law is often slow to catch-up to guard people against these issues. Some of the benefits of new technologies are briefly introduced, together with a simple case study on whether the internet should be regulated.