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Controller Game

2 J

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Objectives

Resources

Materials

Students will make a controller game where a sprite moves when a button sprite it clicked. Other sprites are coded to do an action when the controlled sprite bumps into it.

  • Message Blocks
  • When Clicked
  • When Bumped
  • Movement

Vocabulary Cards

Scratch Jr

Book about Space

Slide Deck

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Lesson Title

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Event

Message block

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Vocabulary

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Introduce: Discuss Events. Show sample project. Explain that this project uses a Message event to make the astronaut move when arrows are clicked. Have students move the correct direction when you tap the arrows on the screen (Slide 6)

Engage: Read a book about space. Suggested title - Fly Guy Presents: Space by Tom Arnold. Discuss some things students might put in a space scene.

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Create: Have students build their project. They could choose to recreate the model program or choose their own scene and sprites.

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Debrief: Do a gallery walk.

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Model: Add space background and astronaut sprite. Open sprite editor and create a triangle shape to be a controller arrow. Open the new sprite again and then the editor. Rotate and paint a new color. Make 4 arrows and organize them on the scene

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Model: Code each arrow to send a unique colored message when it is tapped. Code the astronaut to move the correct direction when it receives each message. Add additional sprites. Code them to move/respond when bumped.

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Book - Fly Guy Presents: Space

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Sample Project

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An action that causes something to happen.

Event

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Move when the arrow is tapped

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Build the Scene

  • Add a sprite

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  • Add a background

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Resize the Sprite

  • Shrink the sprite to fit in scene

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Create Arrow Controllers

  • Create custom arrow buttons to use as controllers

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Create Arrow Controllers

  • Copy, rotate, & paint 3 more arrows

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Broadcast Block

HINT: click the arrow to choose from 6 different colored messages

Send Message

Receive Message

Use these blocks together to cause an algorithm in one sprite to trigger an algorithm in a different sprite.

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Use this block in Sprite#1

Use this block in Sprite#2

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Code Arrows

  • Code a message for each button sprite to send to the astronaut sprite when it is clicked.

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Code Astronaut

  • Code the astronaut to move the correct direction when it receives messages when each button sprite is clicked

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Test Code

  • Put your project in full screen mode
  • Test the buttons by clicking on them to make sure the astronaut moves in the correct direction.

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Add things in Space

  • Add more sprites to the background.

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  • Resize sprites as needed and arrange on scene

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Code sprites with When Bumped Block

  • Code the space sprites to do an action when the astronaut bumps into it.

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Sample Code

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Credits

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Template by SlidesMania

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Fonts used in this presentation: Roboto Slab, Lexend

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Thank you!

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