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Computational Thinking (How to think like a computer scientist)

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Presentation on theme: "Computational Thinking (How to think like a computer scientist)"— Presentation transcript:

1 Computational Thinking (How to think like a computer scientist)
Lesson 2 Algorithms

2 Objectives To know the term ‘Algorithm’ means
To create algorithms to everyday situations

3 Recap - The four cornerstones of Computer Science

4 What is an algorithm? Algorithms are one of the four cornerstones of Computer Science.  An algorithm is a plan, a detailed set of step-by-step instructions to solve a problem.  If you can: tie shoelaces make a cup of tea get dressed prepare a meal then you already know how to follow an algorithm.

5 Video

6 Describing Algorithms
There are two ways of describing an algorithm: Flowcharts – A graphical representation of the steps involved Pseudocode – English like instructions detailing every step

7 Activity 1 Download the Sequencing Worksheet from this link:
Worksheet.docx Or Make sure that you save it to your CT folder. Open the document and follow the instructions

8 Algorithm Problem: How would you write an algorithm that draws this picture of a house like this?: Clue: Think about last lesson’s topic on decomposition

9 The Top Level Draw the outline of the house Draw the chimney
Draw the door Draw the windows Main Draw Outline Draw Chimney Draw Door Draw Windows

10 Activity 2 – Drawing the Windows
Complete the task on Page 2 of the Sequencing Worksheet Remember to save your work! Download the starter code using this link: rter.txt Or


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