Scratch

This book is to help students learn how to program in Scratch. To work through the examples you will need to have access to the Scratch software, which is available

• online at https://scratch.mit.edu, or

• offline as an install at https://scratch.mit.edu/download.

Almost all sections have short videos demonstrating the usage of Scratch to code. For the impatient, the merged, full video is available below.

Contents

• 1. Integrated Development Environment
  • 1.1. Menu
  • 1.2. Code blocks
  • 1.3. Script editor
  • 1.4. Stage
  • 1.5. Program Controls
  • 1.6. Sprite Control
  • 1.7. Backdrop Control
• 2. Motion
  • 2.1. Basic moving
  • 2.2. Basic Rotation
  • 2.3. Moving to a random position
  • 2.4. Moving to the mouse pointer
  • 2.5. Moving to a specific x and y coordinate
  • 2.6. Gliding
  • 2.7. Pointing
  • 2.8. Changing x
  • 2.9. Changing y
  • 2.10. Bouncing
  • 2.11. Rotation styles
• 3. Looks
  • 3.1. Saying something
  • 3.2. Thinking something
  • 3.3. Changing costume
  • 3.4. Changing backdrop
  • 3.5. Changing size
  • 3.6. Changing color
  • 3.7. Showing and hiding
  • 3.8. Layers
• 4. Sound
  • 4.1. Playing sound
  • 4.2. Changing pitch and pan effects
  • 4.3. Changing volume
• 5. Events
  • 5.1. When start is clicked (green flag)
  • 5.2. When a key is clicked
  • 5.3. When sprite is clicked
  • 5.4. When backdrop switches
  • 5.5. When loudness exceeds
  • 5.6. When timer exceeds
  • 5.7. When message received
• 6. Control
  • 6.1. Waiting
  • 6.2. Loops
  • 6.3. Conditionals
  • 6.4. Stopping
  • 6.5. Clones
• 7. Sensing
  • 7.1. Touching
  • 7.2. Distance
  • 7.3. Asking
  • 7.4. Keys
  • 7.5. Mouse
  • 7.6. Drag
  • 7.7. Timer
  • 7.8. Stage
  • 7.9. Days
• 8. Operators
  • 8.1. Math
  • 8.2. Random numbers
  • 8.3. Comparison
  • 8.4. Boolean operators
  • 8.5. String operations
• 9. Variables
  • 9.1. Mutating variables
  • 9.2. Showing and hiding variables
• 10. Custom Blocks
• 11. Costumes
• 12. Sounds
• 13. Sprite
• 14. Backdrops

About

One-Off Coder is an educational, service and product company. Please visit us online to discover how we may help you achieve life-long success in your personal coding career or with your company’s business goals and objectives.

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Copyright

This work is licensed under a Creative Commons Attribution 4.0 International License by One-Off Coder.



The full source code is available on GitHub.

Cite this book as follows.:

@misc{oneoffcoder_scratch_2019,
title={Scratch},
url={https://scratch.oneoffcoder.com},
author={One-Off Coder},
year={2019},
month={Nov}}

Authors

• Jee Vang, Ph.D.

• Joyce Vang

• Patreon