Embedded Files
Code Blocks
Stack blocks are code blocks with a notch at the top or a bump at the bottom. The notches and bumps serve as visual indicators that identify how the blocks can be snapped together to create programming logic. The majority of code blocks provided by Scratch are stack blocks.
Hat blocks are code blocks with a rounded or curved top and a bump at the bottom, visually indicating that it can be snapped on top of other stack blocks. Hat blocks provide the ability to create event-driven scripts.
Reporter blocks is a code block that has either rounded or angled sides and is specifically designed as a mechanism for providing input for other code blocks to process.
Commenting
Comments within a script help the reader understand the Scratch program. It might also help the programmer later and/or if someone else tries to work with your scripts, she will be glad to see the scripts explained in comments.
Sprites
Where do Sprites come from?
Moving a Sprite
How far
How fast?
Which direction?
Concepts in Movement
Changing values in instructions
Initialization
Absolute vs relative movement
Go to and Glide are absolute
Move and Change x (or y) by are relative.
Task 1: Construct an animation that causes the cat (or any sprite) to move 100 steps and then turn 90 degrees counterclockwise each time it is run (by clicking the green flag).
Variation: Have the cat draw a square, triangle, heptagon.
Speaking and Thinking Sprites
Costumes and Costume changes (Absolute vs. Relative)
Sounds
Backgrounds
Loops
Task 2: Make the cat and mouse run forever.
Conditionals: Forever and Forever if
Sensing
Task 3: When the mouse touches the cat, the cat looks sad.
Adding Interactivity #1
Task 4: Move the cat move using the arrow keys.
Task 5: When the cat catches the mouse, the mouse says something and his appearance changes.
Intro to Variables
Task 6: Every time the cat catches the mouse, the mouse scores a point and the mouse loses 10 health points.
Communication between sprites: Broadcast & Receive
Task 7: When the when the cat touches the mouse three times, a new sprite appears on the stage and says, “ I am here to help.” Option: Change background.
Variables and Text: The ASK command.
More with text: the JOIN Command.
Task 8: When the when the cat asks the user their name, he replies “Hello, ‘name.’ I am hungry for a mouse.'"
Animation with costume changes
Phase II Exploring the examples
Phase III: Advanced Concepts
Changing size, appearance, speed and /or position, with variables.
Conditional
If and If Else
Comparing Values in a conditional statement
Compound conditions AND & OR
Show and Hide
Random Numbers
Graphic effects
Pen up and pen down
Phase IV: Create your own
Phase V: Share out and Q & A
References
Armani, M. & Ben-Ari, M. (2013). Computer Science Concepts with Scratch, Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.
Ford Jr., J. Scratch Programming for Teens, 1st Edition (Kindle Locations 1042-1044). Delmar Learning. Kindle Edition
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