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Unit 1

Steps to complete a task.

Computer scientists use an algorithm to plan out the steps they want a computer to follow. Here is an algorithm for Scratch cat:

ALGORITHM

1. Move forward 10 steps

2. Wait 2 seconds

10

2

3. Change color to green

A computer cannot understand the same languages that people speak. We must write code, a special language that a computer understands. An algorithm written in code is called a program.

Here is a program for Scratch cat’s algorithm from above.

Can you match each step of the algorithm with each code block?

PROGRAM

A set of instructions written in a �language that a computer understands.

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Act out and

build scripts.

The Actor (Sprite) uses a script card to act out the script.

The Director makes sure the Actor follows the script correctly.

The Script Builders make the script by putting code blocks together in the correct order.

Scratch Charades is a game where you act out a script and then build the script. There is an:

Actor (Sprite) Director Two Script Builders

Every script will start with a Green Flag clicked or a This Sprite clicked Event.

The scripts will also include Motion, Looks, Sound, and Control blocks.

Motion

Looks

Sound

Control

Hello

3

SCRATCH CHARADES

There are 2 levels of script cards: Green and Blue.

Complete the Green script cards before starting the Blue script cards.

or

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What ideas are you interested in learning more about?

First Programmer: Ada Lovelace

Role Model: bit.ly/firstprogrammerADA

What challenges did Dorothy face?

Based on the video about English mathematician and first computer programmer, Ada Lovelace, put a check next to the statements that are true. bit.ly/firstprogrammerADA

Ada Lovelace did not study what was interesting and exciting to her because girls were not encouraged to learn math and science.
Ideas can be powerful.
It is important that all people are encouraged to study math and science.
Ada’s ideas led to the development of the first computer.

Think about it:

Why do you think women were not encouraged to study math and science 200 years ago?

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TIPP & SEE FRAMEWORK

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Play: Follow the instructions below and circle all the actions that you see.

a. When you click the :
	Moves	Talks	No sprite does anything.
	Talks	Changes Color
b. When you press space bar:
	Moves	Talks	No sprite does anything.
	Talks	Changes Color
c. When you click on :
	Moves	Talks	No sprite does anything.
	Talks	Changes Color
d. When you click on :
	Moves	Talks	No sprite does anything.
	Talks	Changes Color

Click or Type: bit.ly/SeaHunt

Title (of project)

Instructions (how to use project)

Purpose (skills to learn)

UNDER THE SEA TIPP&SEE

Read the following:

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a. Change ‘s block from 50 to 100 steps...
Will Fred move MORE or LESS? �Complete each step:	Predict ⃞	Change Code ⃞	Run Code ⃞
Fred moves (circle the best answer):	MORE	LESS
b. Change ‘s block value from 1 to 2 seconds…
Will Helen’s costume change FASTER or SLOWER? �Complete each step:	Predict ⃞	Change Code ⃞	Run Code ⃞
Helen’s costume changes (circle the best answer):	FASTER	SLOWER

Click . Click on the Sprite and find the Event. Circle your answer.�

a. Predict which block makes swim?

b. Predict which block makes go to the starting position?

c. Predict which block makes change color?

d. Predict which block makes talk?

Ouch!

2

50

-158

80

Ouch!

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50

-158

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Ouch!

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50

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Ouch!

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50

Explore and tinker with the and blocks.

UNDER THE SEA TIPP&SEE (Continued)

-158

80

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2. Your Quest (check ✓ tasks as you complete them)
a. Sign in to your Scratch Account		⃞
b. RoaR&hiSS - Reload, Remix, Share, and +Add to Studio		⃞
		It’s Coded	It Works
	Add a say block to the end of Fred’s Script to make Fred say “Have Fun!”	⃞	⃞
	Change the values in the move blocks or add a move block to make Fred the fish move all the way across the stage.	⃞	⃞
	Change the value in the wait block to make Helen the crab change colors faster when the space key is pressed.	⃞	⃞
	Add a block to make Helen the crab change to a different color when she is clicked. �(Look at the "costumes" tab to see the colors)	⃞	⃞

Sign in to your Scratch Account and RoaR&hiSS

1. Click or Type: bit.ly/SeaHunt

UNDER THE SEA QUEST

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algorithm: a list of steps to complete a task

code: a language that a computer understands

computer science: the study of how to use computers to help humans

computer scientist: a person who studies computers and what they can do

computer: a device that reads an action (input), thinks about the action (store and process), and produces information (output)

debugging: finding and fixing problems in an algorithm or program

event: an action that causes something to happen

loop: a sequence of instructions that is repeated

program: an algorithm written in a language that the computer understands

sequence: a set of instructions that follow one another in order

synchronization: coordinating actions between different sprites

WORD LIST

Computer Science Vocabulary

remix: to copy a project and make personal changes to it

script: a set of code blocks used to direct the action of a sprite

sprite: an object or character you can program in Scratch

stage: the scenic area of the Scratch project

studio: a place where students from a class can save their projects together

Scratch-related Vocabulary

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SCRATCH BACKDROPS

Fantasy

Music Underwater

Sports

Space

Indoors

Outdoors

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SCRATCH SPRITES

People (not shown in other categories)

Sports

Dance

Letter Styles (Block, Glow, Story)

Additional people sprites exist as costumes

Sprite has multiple costumes

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SCRATCH SPRITES

Animals (not already shown in another categories)

Music

Sprite has multiple costumes

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SCRATCH SPRITES

Fantasy

Food

Fashion

Additional sprites exist as costumes

Sprite has multiple costumes

Additional sprites exist as costumes

Additional sprites

exist as costumes

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HELPFUL SCRATCH VIDEO LINKS

Using the Backpack bit.ly/UseBackpack	Add in Comments bit.ly/AddingComments	Setting XY Coordinates Setting XY Coordinates
Adding Letters as Sprites bit.ly/AddLetters	Add Backdrop and Decorate bit.ly/changebackdrop	Add Color Effects bit.ly/coloreffects
Add Sound bit.ly/spritesound	Make Sprites Bounce Around bit.ly/SpriteBounce	Make Sprites Spin bit.ly/SpriteSpin
Make Sprite Change Sizes bit.ly/ChangeSize	Animate Your Name: Combining Ideas bit.ly/CombiningIdeas	Change vs. Set Blocks bit.ly/changeVSset
Adding Images from Outside of Scratch bit.ly/addmypic1	Remove Background from your Images bit.ly/RemoveBkgrd	Set up your Stage bit.ly/ScratchStage
Edit Sprites and Background bit.ly/editSprite	Image Editor: Vector Mode bit.ly/VectorMode	Image Editor:Bitmap Mode bit.ly/BitmapMode
Animated Gif bit.ly/AnimateGIF	Create Costumes for Animations bit.ly/animationCostume	Create a Random Dancer bit.ly/RandomDancer
Adding Text to a Backdrop bit.ly/BackdropText	Create a Start Button bit.ly/CreateStartButton	Using the “When backdrop switches to” Block bit.ly/SwitchBackdrop
Record Your Voice bit.ly/RecordVoice	Drawing a Backdrop bit.ly/drawbackdrop	Start sound vs. Play sound until Done bit.ly/2startsound

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