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I write and use presentations to teach OCR GCSE Computer Science
Searching and Sorting Algorithms

Searching and Sorting Algorithms

GCSE OCR Computer Science Searching and Sorting algorithms Objectives: To understand… Searching algorithms and how they work Sorting algorithms and how they work To be able to Demonstrate knowledge of, explain and write algorithms to show how to… Binary search Linear search Bubble sort Merge sort Insertion sort
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Representing Characters - Character Sets

Representing Characters - Character Sets

OCR GCSE Computer Science Representing Characters & Character Sets Objectives: Explain the use of binary code to represent characters Explain the term character set Describe with examples (i.e ASCII and UNICODE) the relationship between the number of bits per character in a character set and the number of characters which can be represented
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Logic Gates

Logic Gates

OCR GCSE Computer Science LOGIC GATES Objectives: Understand what is meant by binary Why do computers use binary Understand what is meant by a TRUTH table Be able to read simple logic circuits Be able to create and append to circuit diagrams
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Binary - An Introduction

Binary - An Introduction

OCR GCSE Computer Science Binary - Learning how to convert Binary numbers Objectives Understand the base system Understand Binary numbers and why we use them Look at how to convert 8 bit binary numbers to denary and vice versa
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Types of Software

Types of Software

OCR GCSE Computer Science Types of Software Objectives: Understand the keywords of “open source”, “proprietary”, “custom written” and “off the shelf” software Be able to understand the advantages/disadvantages, and key features of custom written, off the shelf, open source and proprietary software. Be able to discuss and write exam style answers to respond to questions about the types of software.
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Network Theory

Network Theory

OCR GCSE Computer Science Network Theory Objectives explain the advantages of networking stand-alone computers into a local area network describe the hardware needed for a local area network, roles of computers in a client-server and a peer-to-peer network describe, ring, bus and star network topologies describe the differences between a LAN and WAN
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CPU - An introduction

CPU - An introduction

OCR GCSE Computer Science The Central Processing Unit Objectives: State the purpose of the CPU Describe the function of the CPU as fetching and executing instructions stored in memory Explain how common characteristics of CPU’s such as clock speed, cache size and number of cores affect performance.
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Secondary Storage Devices

Secondary Storage Devices

OCR Computer Science Secondary Storage Devices Objectives: Explain the need for secondary storage Understand the three main storage types Optical Magnetic Solid State Learn the characteristics of secondary storage
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Memory

Memory

OCR GCSE Computer Science Memory Objectives: Describe the differences between ROM and RAM Explain the need for ROM in a computer system Describe the purpose of RAM in a computer system Explain how the amount of RAM in a PC affects its performance Explain the need for virtual memory Describe cache memory Describe flash memory Discuss how changes in memory technologies are leading to innovative computer designs
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