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Assessment GCSE
Year 9 Year 10 Year 11
3.1 Algorithms
Effective Notetaking Understanding Algorithms Decomposition Abstraction Flowcharts Flowcharts 2 Trace Tables Searching Algorithms Bubble Sort Merge Sort
3.2 Programming
Imperative Languages Variables Data Types Input/Output Arithmetic Operators Comparison Operators Using Selection For - loops While - loops Data Structures String Manipulation Random Numbers File Operations Procedures Program Structure Data Validation Data Authentication Errors and testing high and low level languages
3.3 Data representation
3.3.1 - Number Bases 3.3.2 - Converting Number Bases 1 3.3.4 - Binary Arithmetic 3.3.2 - Converting Number Bases 2 3.3.3 - Units of Information 3.3.5 - Character Encoding 3.3.6 - Representing images 3.3.7 - Representing Sound 3.3.8 - Data Compression 3.3.8 - Huffman Coding
3.4 Computer Systems
Boolean Logic Operating systems Utility Software Computer Architecture CPU Types of Memory Storage Media
3.5 Computer Networks
Networks Overview Network Topologies Network Hardware Network Protocols Network Security Network Layers

Overview

Learning Objectives

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ID	Skill_name
3.1.1.1	I can understand and explain the term algorithm.

🏁 Learning Objective Understanding Algorithms

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Lesson Tasks

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Algorithms - Learning Activities

An Algorithm is Like a Recipe

An algorithm is simply a sequence of steps used to solve a problem, like a recipe. See right. Our recipe might tell us how to create an apple pie or lemon cake.

To get a computer to do something we have to tell it what to do. We do this by using a set of instructions. These instructions are called algorithms.

An algorithm has a defined outcome – a defined end. Algorithms can be written in many different ways. Each way has a different cost, different speed and requires different external hardware.

A Recipe

Algorithms in programming

You are creating an algorithm every time you write a program. You are creating a set of steps to perform a task. Before we create a computer program we write it out in one of two ways.

1. As a set of intructions like a recipe.

2. As a flowchart.

Different wasy to create an algorithm

Creating an algorithm

Task 1: Find the error.

The following pseudocode algorithm has an error. The program is suppose to ask the user for the length and width of a rectangular room, and then display the room's area. the program must multiply the width by the length in order to deteremine the area.

area= width x length.
display "what is the room's width?".
input width.
display "what is the room's length?".
input length.
display area.

Task 2: Create an algorithm

Learning Outcomes

I can explain what an algorithm is.
I can read an algorithm and find any errors in it.
I can create my own algorithm to solve a problem.