Learnearn.uk » KS3 Algorithms Unit » flowchart lesson plan

# flowchart lesson plan

## Introduction

### Introduction to Flowcharts

flowchart is like a visual map that helps you understand and follow a process or make decisions step by step. It uses different shapes and arrows to show the order of actions or choices you need to take. Each shape in a flowchart represents a different action or decision, and the arrows show you the direction to move in. You start at the beginning and follow the arrows until you reach the end. It’s like having a visual guide that helps you stay organized and make better choices.

Flowcharts can be helpful when programming as the help you break problems down into subproblems in a visual way. They are also useful for explaining algorithms to non-programmers.

## Flowchart Shapes

### Flowchart Shapes

Start/End

Represents the beginning or end point of the program.

Process/Action

Represents a specific task or action being performed, such as calculations, data manipulation, or function calls.

Input / Output

Represents the input or output of data to or from the program, such as reading user input or displaying results.

Decision / Conditonal

Represents a branching point in the program where a condition is evaluated, and different actions are taken based on the result, typically represented as a diamond shape. They usually contain a conditional statement, such as if statements, switch cases, or loops.

Arrow

The flow of the chart is indicated by arrows

Data Storage

Indicates a read from / write to data storage

Subroutine/Function

Represents a separate block of code that is called and executed as a part of the main program, typically represented as a rectangle with rounded corners.

## Example 1

### Example 1 – Simple Flowchart with decision

Here is a simple flowchart example.

Simple flowchart example, source: Wikipedia

## Example 2

### Example 2 – Flowchart with loop

A flowchart with a loop. Source: Wikipedia

## Practice

### Practice Activities

Choose one of the following activities and write your own flowchart.

Story Flowchart

Create a flowchart based on a funny or adventurous story. Start by writing a short story with multiple paths and decision points. Then, translate the story into a flowchart, assigning different shapes and arrows to represent the actions and choices taken by the characters.

Recipe Flowchart

Choose a favorite recipe and create a flowchart to visualize the cooking process. Break down the recipe into individual steps and decisions, such as ingredient measurements, cooking times, and alternative options. Use flowchart symbols to represent each step, and arrows to show the flow of the cooking process.

Design a flowchart that simulates a “choose your own adventure” game. Begin with a starting point and create branching paths based on different choices or actions. Add interesting consequences or outcomes to each decision point. This activity allows you to practice creating interactive and engaging flowcharts.

Day in the Life Flowchart

Imagine a typical day in your life and create a flowchart that represents the different activities and decisions you make throughout the day. Include actions like waking up, getting ready, meals, hobbies, and any other events. Use flowchart symbols to represent each activity and connect them with arrows to show the sequential flow of your day.

Board Game Flowchart

Invent a simple board game with rules and gameplay. Design a flowchart that outlines the different stages of the game, including setup, turns, actions, and victory conditions. Use flowchart symbols to represent each game component and connect them with arrows to show the flow of the game.