That Blue Square Thing

Key Guides:

Binary maths – a summary of key points

How many binary numbers – a summary

A single slide to check when you're asked "how many binary numbers can you represent with 5 bits" or "what is the largest number you can represent using 3 bits". That confusing bit. For more detail see the Unit 3 pages.

Formulae – the ones you need to know

This is the 3 (or 5) formulae you need to know for unit 3.

AQA Computer Science GCSE

Homeworks

This is a set of homeworks I set in Year 10 the last time I taught the syllabus, with answers. It covers units 3, 5 and 6 and some of unit 4.

28 September: Binary Qs 1 (answers)

4 October: Binary Qs 2 (answers)

12 October: Binary Addition Qs (answers)

18 October: Binary Shift and Hex Qs (answers)

2 November: Binary Shift and Hex Qs (answers)

15 November: ASCII and Unicode (answers)

22 November: Image representation (answers)

30 November: Sound representation (answers)

6 December: RLE Questions (answers) – Revision – Prep questions from class

11 January: Unit 3 Qs (answers)

16 January: Huffman Tree Qs

25 January: –

31 January: Network Qs

8 February: Revision for Networks test

7 March: Complete any missing notes on Security definitions, 7 types, penetration testing and social engineering

13 March: Security HW questions (answers)

21 March: Revision for Cyber Security test – use this document and this one for Unit 5

25 April: Types of software (answers)