This document provides instructions for students to create programs in Scratch involving interactions between characters. Students will learn to sequence instructions, synchronize timings using wait commands, and incrementally develop projects. They will create programs telling knock knock jokes, mimicking a comedy night with comedians walking on and off stage, and will start using event blocks next week. The document also includes review questions about ensuring programs work properly.

1. Story Time

2. Starter Activity: “Knock, Knock”
Use the Internet to find a “Knock, Knock” joke.
You will need this later in the lesson
Story Time

3. Story Time
This lesson you will learn the concept of
sequencing instructions and how to synchronise
timings using the wait command. You will create a
program based around characters talking.
Lesson
 Create stage based characters scenes
 Sequence instructions
 Synchronise timings using the wait command
 Incrementally develop a project
Objectives

4. Watch the video Bad Joke which is in the
programming in scratch folder in Groupwork to
learn how to create a program that involves
interaction between characters.
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5. Task 3: Knock, Knock, Joke
Using the joke you found earlier, create a “Knock,
Knock” joke program that uses two characters like
the one in the video.
If you get struck, look back at the video.
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6. Did you have any problems and what you did to
overcome them?
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7. Task 4: Comedy Night
Create a program that mimics a comedy night
setup. There are to be three comedians (sprites)
on the stage. Each comedian is to take it in turn to
tell one traditional style joke.
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8. Task 5: Walk-On
In your ‘Comedy Night’ program make the
comedians walk onto the stage, and walk off when
they have said their joke.
You will have to start your sprite characters at the
edge of the screen.
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9. Some computer programs just run and continue
on their own with no input from the user e.g. a
program to make a character walk onto the stage.
However, many programs react to events (things
that happen), such as:
•The click of a mouse or press of a key
•The tilt of a game controller
•A swipe of a smartphone screen
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10. In Scratch, event blocks have a curved top. They
react in different ways:
•When the green flag is clicked.
•When the space bar key is pressed.
•Reacts when a sprite is clicked.
You will start to use some of these blocks next
week.
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11. Plenary: Question 1
The program below shows the scripts for two
sprites to tell a joke to each other. Why would the
program not work?
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Girl Boy

12. Plenary: Question 2
The program below
shows the scripts for
two sprites to tell a
joke to each other.
Aside from being a
terrible joke, what is
wrong with the
program?
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13. Plenary: Question 3
The program below shows the scripts for two
sprites to tell a joke to each other. Why would the
program not work?
Story Time
Girl Boy

14. Story Time
Keywords
 Create stage based characters
 Sequence instructions
 Synchronise timings using the wait command
 Incrementally develop a project
Objectives
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 Sequence
 Costume
 Wait
 Characters
 Code
 Sprite
 Stage
 Event