7- scratch - lists

• Computing
• Lower Secondary (Key Stage 3)

Scratch Lists

Can you remember what a variable is?

1. A function to perform maths.
2. A conditional statement for decision-making.
3. A loop to iterate through data.
4. A container to store data.

Key Objectives

Understand what lists are and how they work in Scratch.

Create and manipulate lists in Scratch

Create interactive projects using Scratch

Uses for lists in
programming?

Let's make a list.

https://scratch.mit.edu/

• Make a list, containing your five favourite things.
• Delete the 3rd thing, leaving the others.
  
• Change the 5th thing to "Mr. Motley's lessons"

What is an if statement?

1. An if statement is used to repeat a block of code a specific number of times.
2. An if statement is used to store data in memory
3. An if statement is used to make decisions based on certain conditions.
4. An if statement is used to create graphical user interfaces.

Let's make a quiz game #1

https://scratch.mit.edu/

• Open 2 notepad windows
• In the first write 3 questions about yourself
• In the second write the correct answers
• Save those as questions and answers

Let's make a quiz game #2

https://scratch.mit.edu/

• Import the files into lists in scratch
• Have Scratchy ask your first question
• Take the user's input
• Check the user's answer against the correct answer
• Harder: Move the quiz on to questions 2 and 3
• Harder: Add a working score counter

What do the light blue "sensing" blocks do?

1. They change the sprite’s appearance by applying filters.
2. They control the sprite’s motion and direction.
3. They allow the sprite to detect collisions with other sprites.
4. They play sounds and music during the program execution.

Final boss: 

Create an inventory system list.

Add a sprite for something to store in an inventory

Create an inventory list and a way to add to it

Add another character and a way for them to check if you have an item in your inventory

Have them remove the item from your inventory

What have you learned?
What skills have you used?
What did you find challenging?
What have you improved on?
What do you need to remember?