1. 2
Making Blocks with INPUTS

2. 1 2 3 Today’s Objectives Know how to break problems down into chunks
Know how to define blocks with inputs 3
Know how to call the blocks in a program
Create programs where you create your own blocks with inputs

3. Homework  Subject Homework Date Done Computing
Learn “2. Making Modular Programs” for test 

4. ‘Smarter’ programming
Smart programmers break problems down into smaller parts so they can write code in chunks or modules.
In Scratch, you create modules by making your own blocks.
Scratch Blocks
Own Blocks

5. dd/mm
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6. 2. Making Modular Programs
dd/mm
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7. 2. Making Modular Programs
dd/mm

8. 2. Making Modular Programs
dd/mm
Smart programmers break problems down into smaller parts so they can write code in chunks or modules.

9. 2. Making Modular Programs
dd/mm
Smart programmers break problems down into smaller parts so they can write code in chunks or modules.
Modules of code are good because:
You can give them names
You can give them different inputs to vary the results
And chunks make a program easier to understand and debug

10. Scratch blocks can take INPUTS
number
e.g. 1, 20, -2, 3.4
number
e.g. 90, 15, -180
text
e.g. “Hi”, “meow”, “Correct”

11. 3 Stages of creating blocks
BLOCK NAME
3 Stages of creating blocks
You define a block with a meaningful name
You add any inputs like special variables to use in the block
You call the new block from your program
INPUT
Use
INPUT like a block variable
length

12. 2. Making Modular Programs
dd/mm
Smart programmers break problems down into smaller parts so they can write code in chunks or modules.
Modules of code are good because:
You can give them names
You can give them different inputs to vary the results
And chunks make a program easier to understand and debug
In Scratch, you create modules by making your own blocks in 3 stages:
You define a block with a meaningful name
You add any inputs like special variables to use in the block
You call the new block from your program

13. In Scratch, you create modules by making your own blocks in 3 stages:
You define a block with a meaningful name
You add any inputs like special variables to use in the block
You call the new block from your program
Here is an example of how you define & call a block that uses inputs:

14. Making a block with INPUTS
number or text
label
label

15. Making Blocks
input
number or text
input
boolean
label

16. draw square input steps
number or text
label
label

17. Define block with inputs
Inputs are like special block variables

18. Challenges
Draw this pattern
Draw any pattern

19. draw any shape input steps input sides
text or number
input
text or number
label
label
label

20. Define

21. Challenges
Draw pattern using draw any shape block
Draw any pattern

22. Challenges
Draw this pattern
Draw any pattern

23. 1 2 3 Today’s Objectives Know how to break problems down into chunks
Know how to define blocks with inputs 3
Know how to call the blocks in a program
Create programs where you create your own blocks with inputs