event organizing guide - Scratch Day - MIT
event organizing guide - Scratch Day - MIT
event organizing guide - Scratch Day - MIT
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<strong>event</strong> <strong>organizing</strong> <strong>guide</strong>
Welcome!<br />
Greetings from the <strong>MIT</strong> <strong>Scratch</strong> Team!<br />
We are very excited that you want to learn more about <strong>Scratch</strong> <strong>Day</strong>. We hope that you will organize a <strong>Scratch</strong><br />
<strong>Day</strong> <strong>event</strong> with the members of your own local community. This <strong>guide</strong> has been designed to help you with<br />
<strong>event</strong> design, providing many of the resources you might need for a successful <strong>event</strong>.<br />
All <strong>Scratch</strong> <strong>Day</strong> <strong>event</strong>s are different – and you may find that some aspects of this <strong>guide</strong> are not applicable to<br />
your <strong>event</strong>. Feel free to pick and choose the elements that interest you most. We love remixing ideas!<br />
Before we explore the details of a <strong>Scratch</strong> <strong>Day</strong> <strong>event</strong>, here is an overview of what you will find in this <strong>guide</strong>.<br />
introduction<br />
imagine<br />
organize<br />
share<br />
conclusion<br />
hand-outs<br />
In this section, we will explore <strong>Scratch</strong> <strong>Day</strong> and how it came to be. This section<br />
also introduces the <strong>Scratch</strong> and <strong>Scratch</strong>Ed online communities.<br />
Use this section to get started planning your <strong>Scratch</strong> day <strong>event</strong>! Brainstorm ideas<br />
and goals for how to make your <strong>event</strong> meaningful for your participants.<br />
Time for some fun activities! This section will give you examples of different<br />
ways to organize your <strong>event</strong>.<br />
This section will walk through how to share your <strong>event</strong>. It describes some things<br />
to think about before, during, and after your <strong>event</strong>.<br />
How can the <strong>Scratch</strong> team further support your <strong>Scratch</strong> day planning efforts? Let<br />
us know and happy <strong>Scratch</strong> day!<br />
This final section provides some extra resources including a lots of activities and<br />
<strong>Scratch</strong> cards to help you and your participants get started with <strong>Scratch</strong>.
introduction<br />
This section will introduce you to the world of <strong>Scratch</strong>. <strong>Scratch</strong> is an authoring environment that makes it easy<br />
for people to create their own interactive stories, games, animations, and simulations – and share their work<br />
with other creators in an online community. <strong>Scratch</strong> <strong>Day</strong> is a worldwide network of gatherings designed to<br />
bring the people in this online community together to meet, share, and learn with <strong>Scratch</strong>.<br />
2
What is <strong>Scratch</strong> <strong>Day</strong>?<br />
<strong>Scratch</strong> <strong>Day</strong> is a worldwide network of gatherings, where people come together to meet each other, share<br />
projects and experiences, and learn more about <strong>Scratch</strong>.<br />
Every <strong>Scratch</strong> <strong>Day</strong> <strong>event</strong> is different. All over the world, organizers plan different types of <strong>event</strong>s for different<br />
audiences. Whether you are an experienced <strong>Scratch</strong>er or new to the <strong>Scratch</strong> community, <strong>Scratch</strong> <strong>Day</strong> is a great<br />
way to celebrate <strong>Scratch</strong>!<br />
History of <strong>Scratch</strong> <strong>Day</strong><br />
In 2008, we hosted the first <strong>Scratch</strong> conference. Although the conference was very successful, with hundreds of<br />
people joining us at <strong>MIT</strong>, there were a few questions that emerged.<br />
First, the conference had been focused on the participation of adults - educators, researchers, and developers<br />
- yet so much of <strong>Scratch</strong> is driven by the passionate participation of young people. How could young people be<br />
more involved in a gathering like this?<br />
Second, the <strong>Scratch</strong> community is an international one, with people having attended the conference from 30<br />
different countries around the world. Could the <strong>Scratch</strong> conference be hosted somewhere else in the world?<br />
From these questions, the <strong>Scratch</strong> <strong>Day</strong> concept emerged – a day where people could gather in their local<br />
communities and celebrate with fellow <strong>Scratch</strong>ers! Since the first <strong>Scratch</strong> <strong>Day</strong> in 2009, hundreds of <strong>event</strong>s have<br />
been hosted, with thousands of young <strong>Scratch</strong>ers, parents, and educators from around the world participating<br />
in the gatherings.<br />
3
What is <strong>Scratch</strong>?<br />
<strong>Scratch</strong> is an authoring environment that makes it easy for people to create their own interactive stories,<br />
games, animations, and simulations – and share their work with other creators in an online community.<br />
Projects are created by snapping together blocks, as one would snap together LEGO bricks or puzzle pieces.<br />
Projects can then be shared with an active online community consisting of hundreds of thousands of registered<br />
members. Community members regularly comment on projects to ask questions and give feedback, create<br />
galleries of related projects, download projects to study their construction, and remix downloaded projects to<br />
be re-shared online.<br />
To learn more about <strong>Scratch</strong>, visit http://scratched.media.mit.edu/ and watch the introductory video. Also,<br />
check out the forums on the <strong>Scratch</strong> website for help from the <strong>Scratch</strong> team and the <strong>Scratch</strong> community.<br />
http://scratch.mit.edu/<br />
imagine program share<br />
*To read more about the design of <strong>Scratch</strong> and the <strong>Scratch</strong> online community, see the following sources:<br />
Resnick, M., Maloney, J., Monroy-Hernandez, A., Rusk, N., Eastmond, E., Brennan, K., Millner, A., Rosenbaum, E., Silver, J., Silverman, B., &<br />
Kafai, Y. (2009). <strong>Scratch</strong>: Programming for all. Communications of the ACM, 52(11), 60-67.<br />
Brennan, K., Resnick, M., & Monroy-Hernandez, A. (2010). Making projects, making friends: Online community as catalyst for interactive<br />
media creation. New Directions for Youth Development, 2010(128), 75-83.<br />
4
What is <strong>Scratch</strong>Ed?<br />
<strong>Scratch</strong>Ed is an online community where educators who are working with <strong>Scratch</strong> (or want to learn more about<br />
working with <strong>Scratch</strong>) can share stories, exchange resources, ask questions, and connect with other educators.<br />
<strong>Scratch</strong> is already being used by many educators across a wide range of contexts, from elementary through<br />
college and across disciplinary areas.<br />
On the <strong>Scratch</strong>Ed website, you can find our recently-released <strong>Scratch</strong> Curriculum Guide. This resource is for<br />
educators who are looking for a <strong>guide</strong> that provides an introduction to creative computing with <strong>Scratch</strong>. It is<br />
http://scratched.media.mit.edu/<br />
To learn more about <strong>Scratch</strong>Ed, http://scratched.media.mit.edu/<br />
ED<br />
learn | share | connect<br />
To explore the Curriculum Guide, http://scratched.media.mit.edu/resources/scratch-curriculum-<strong>guide</strong>-draft<br />
5
imagine<br />
<strong>Scratch</strong> <strong>Day</strong> <strong>event</strong>s come in all shapes and sizes. Depending on your audience, workshops, open houses,<br />
show-and-tell, bar camps, or parties are all fun ways to meet, share, and learn with <strong>Scratch</strong>. You could offer<br />
an introduction to <strong>Scratch</strong> or maybe a deeper exploration of <strong>Scratch</strong> through a theme or genre of project.<br />
6
Goals<br />
What do you want participants to get out of your <strong>event</strong>?<br />
Setting goals is good for the organizer, as it helps <strong>guide</strong> planning of the <strong>event</strong>s’ activities. Sharing those goals<br />
with participants is also good, as it helps participants feel prepared for the experience.<br />
At the beginning of the <strong>event</strong>, discuss the goals (what we want to achieve, the attitudes, knowledge, and skills<br />
to be developed in the session) and agenda (how we will achieve it, the plan for the session) with participants.<br />
The goals and agenda - as well as how explicitly you discuss them will vary with your audience.<br />
The magic of <strong>Scratch</strong> <strong>Day</strong> is<br />
that it is what you make it.<br />
Imagine the possibilities – what<br />
will your <strong>Scratch</strong> <strong>Day</strong> look like?<br />
7
organize<br />
At this point, you’ve defined a vision for what your <strong>Scratch</strong> day will be like. It’ s time to dig into the details of the<br />
day and identify the resources that you’ll need to make it a success. Organizing an agenda for the day (from<br />
set-up to clean-up) will help you think through what people and resources you might need to get things done.<br />
This section begins with icebreaker activities to help you and your participants get your <strong>event</strong> started. The<br />
next step is to introduce <strong>Scratch</strong>. Whether you are hosting an <strong>event</strong> with participants who are new to <strong>Scratch</strong><br />
or experienced <strong>Scratch</strong>ers, an introductory activity is a good way to set the stage and help participants<br />
understand what they will be doing during your <strong>event</strong>.<br />
After the introductory activities come the main activities. These enable participants to dive deeper into <strong>Scratch</strong><br />
and make projects. Finally, the closing activities allow participants to reflect and share their work.<br />
8
Icebreaker Activities<br />
No matter what your <strong>event</strong> looks like, opening activities, or icebreakers, are often a good way to invite<br />
participants into the day. Even if your <strong>Scratch</strong> <strong>Day</strong> participants already know each other, you can have lots of<br />
fun getting to know each other (and <strong>Scratch</strong>) better. Here are some fun examples of icebreaker activities.<br />
Name Game<br />
Go around the entire group with each person<br />
introducing her/himself, such as sharing name,<br />
motivation for attending, hopes for the workshop<br />
session. For an additional challenge, the current<br />
person could also introduce every previous person.<br />
Colorful Introductions<br />
Create a bowl that contains a bunch of colorful<br />
objects, like a collection of red, blue, and yellow LEGO<br />
bricks. Each color represents different categories of<br />
facts. Each person takes a handful of the objects and<br />
then shares information about him/herself based<br />
on the colors s/he selected. For the workshop, the<br />
questions could have a <strong>Scratch</strong> flavor.<br />
For <strong>Scratch</strong>ers who are just starting, you could use:<br />
+ Red: Something you notice about the user interface<br />
+ Blue: Your favorite character in the sprite library<br />
+ Yellow: Something you hope to create with <strong>Scratch</strong><br />
For <strong>Scratch</strong>ers with some experience, you could use:<br />
+ Red: Your favorite <strong>Scratch</strong> project<br />
+ Blue: Explanation of a feature you’ve used in <strong>Scratch</strong><br />
+ Yellow: Something you would change about <strong>Scratch</strong><br />
Personal Flag<br />
Each participant constructs a flag using craft<br />
materials that contains his/her name and represents<br />
her/his interests. People can then introduce their flags<br />
or post them on a shared surface.<br />
Find Someone Who<br />
Make a bingo card sheet with each block containing<br />
an attribute, like:<br />
+ Find someone who has at least 4 <strong>Scratch</strong> projects<br />
posted online.<br />
+ Find someone who knows who Gobo is.<br />
+ Find someone who has used the broadcast block.<br />
+ Find someone who helps people learn <strong>Scratch</strong>.<br />
+ Find someone who has been <strong>Scratch</strong>ing for more<br />
than a year.<br />
+ Find someone who posts to the <strong>Scratch</strong> forums.<br />
Participants get to know other <strong>Scratch</strong>ers by finding a<br />
different person to sign each block on their sheet. (See<br />
page 20)<br />
Getting To Know You<br />
On sheets of chart paper write survey questions, like:<br />
+ If you could have an endless supply of any food,<br />
what would you get?<br />
+ If you were an animal, what would you be?<br />
+ What’s your favorite thing to do in the summer?<br />
+ If you could visit any place in the world, where<br />
would you choose to go?<br />
+ Are you a morning or a night person?<br />
+ What are your favorite hobbies?<br />
+ What’s the weirdest thing you’ve ever eaten?<br />
+ What three words would you choose to describe<br />
yourself?<br />
Have participants write their answers on post-it notes<br />
that they can cluster on the chart paper to identify<br />
similarities and differences.<br />
9
Introductory Activities<br />
After the opening activities, it is often important to introduce some of the basics of <strong>Scratch</strong> - as a tool, as an<br />
activity. There are many different ways to introduce <strong>Scratch</strong>.<br />
Demo<br />
It is often useful to start by showing participants how to build up a project. Just open up <strong>Scratch</strong> and create<br />
a simple project, like making the cat dance back and forth to a beat. How much you show at once in a demo<br />
depends on numerous factors but some basic tasks that are useful to demo include:<br />
+ how to snap blocks together<br />
+ how to make a sprite move and say something<br />
+ how to add another character<br />
+ how to change the background image<br />
Sample Projects<br />
In addition to showing how easy it is to create a project by snapping blocks together, it is also good to show<br />
participants a range of things that have been created with <strong>Scratch</strong>. Visit the <strong>Scratch</strong> website to find projects<br />
that will inspire your participants.<br />
Other Resources<br />
Some workshops are facilitated in a less centralized fashion - leaving the participants to explore the<br />
fundamentals of <strong>Scratch</strong> through resources rather than through demonstration. The support page on the<br />
<strong>Scratch</strong> site links to videos, a step-by-step <strong>guide</strong> to creating a first <strong>Scratch</strong> project, and a set of cards to explore<br />
various code excerpts. Of course, these approaches are not exclusive. The facilitator can lead with a brief<br />
demo, while making these other resources available to accommodate different learning styles.<br />
10
Main Activities<br />
After introducing <strong>Scratch</strong>, it is time to engage in <strong>Scratch</strong> design activities. Depending on the length of your<br />
<strong>event</strong>, several cycles of introducing-creating-sharing may be planned and a variety of activities may be<br />
included. Activities may explore different themes, genres, or constraints. A short project-creating activity could<br />
be followed by a longer activity, or a series of shorter activities could be planned. Here are a few suggestions<br />
for projects.<br />
8 blocks<br />
Getting started with all 100+ blocks in <strong>Scratch</strong> can<br />
be overwhelming. In this activity, participants create a<br />
project using eight pre-specified blocks. (See page 21)<br />
Monkey Business<br />
Participants start with a new project. The challenge?<br />
Create a project in which something surprising<br />
happens to a monkey.<br />
Interactive Postcard<br />
Are the workshop participants in a location that’s<br />
new to them? Where in the world do participants<br />
wish they were? Participants collect and create audio<br />
and visual representations of a location and create a<br />
project that documents the place. The postcard could<br />
take numerous forms, such as an interactive map or a<br />
photo gallery.<br />
Interactive Us<br />
Participants incorporate their voices and images into<br />
a project, creating something that helps others learn<br />
about themselves and the people, issues, and things<br />
they care about. (See page 22)<br />
Let’s Play<br />
A game has a goal, rules, and an outcome. In this<br />
activity, participants create a game with <strong>Scratch</strong>. It can<br />
be completely new or a re-creation of an old favorite.<br />
(See page 23)<br />
Pass It On<br />
11<br />
What happens when you share a story? In this activity,<br />
participants each begin a story and have a few<br />
minutes to elaborate on it however they choose.<br />
When the time is up, they pass the computer to<br />
another participant, who continues the story. After one<br />
or two more passes, the story is finished.
Closing Activities<br />
While participants will likely be sharing and collaborating throughout the design process, it is important to<br />
dedicate time to sharing and reflection, so that both participants and facilitators can discuss what happened<br />
and share reflections on or analysis of the activities. Some strategies for sharing and reflection include:<br />
Show and Tell<br />
Each participant (or team of participants) has an opportunity to demonstrate what was created and discuss<br />
design experiences, either with the entire group or in smaller groups. It’s useful to provide some concrete<br />
questions for participants to think about and respond to. What did you and surprising? What was challenging?<br />
What motivated or influenced your project decisions?<br />
Galleries<br />
In addition to sharing with the other participants, the <strong>Scratch</strong> online community can be used to share projects<br />
developed in the workshop. Create a gallery and encourage participants to post their projects (with project<br />
notes describing how to interact with the project and about the process of creating the project).<br />
Lessons Learned<br />
Reflecting on their processes, participants can create a <strong>guide</strong> of lessons learned for future <strong>Scratch</strong>ers. What<br />
approaches, techniques, or tips would they recommend? Create a mind map or “Top 10” list of the ideas and<br />
suggestions.<br />
12
share<br />
There are a few different ways to think about sharing your <strong>event</strong>.<br />
+ Before your <strong>event</strong>, you will need to share <strong>event</strong> details with participants so that they can join you!<br />
+ During your <strong>event</strong>, you may want to document it to share with the participants and the <strong>Scratch</strong> community.<br />
+ After your <strong>event</strong>, you will want to think of ways to share your <strong>event</strong> with others to celebrate all that you<br />
accomplished and to learn the strengths and weaknesses of your <strong>event</strong> to improve for next year.<br />
The next few pages walk you through some ways to share your <strong>event</strong>!<br />
13
Inviting Participants<br />
Now that you have identified your audience and established the goals for your <strong>event</strong>, how will you get<br />
participants to join you?<br />
<strong>Scratch</strong> <strong>Day</strong> Website<br />
The <strong>Scratch</strong> <strong>Day</strong> website allows you to publish your <strong>event</strong>. The <strong>Scratch</strong> <strong>Day</strong> map is an easy way for people to<br />
find out about your <strong>event</strong>. Just create an account and add your <strong>Scratch</strong> <strong>Day</strong> <strong>event</strong>. You can also use the <strong>Scratch</strong><br />
<strong>Day</strong> website forums to share details, invite people, and get feedback about your plans.<br />
<strong>Scratch</strong> Forums<br />
To get in touch with an even bigger audience, you can contribute to the <strong>Scratch</strong> forums, where we’ve set up a<br />
forum dedicated to announcements and discussions about <strong>Scratch</strong> <strong>Day</strong> <strong>event</strong>s.<br />
Your Personal Network<br />
Do you belong to any mailing lists that send to people that might be interested in your <strong>event</strong>? You can ask<br />
friends and colleagues if they have suggestions for electronic outreach, like connecting with a local library,<br />
community center, or school. You can also reach out via social media by creating an <strong>event</strong> on Facebook or a<br />
hashtag on Twitter.<br />
14
Sharing With Your Community<br />
What happened at your <strong>event</strong>?<br />
By documenting your day, you’ll have resources for reflection and discussion, both for your <strong>event</strong>-goers and<br />
for the broader <strong>Scratch</strong> community. <strong>Scratch</strong> projects, videos, audio, photos, notes – all of these could help<br />
communicate what you did. The <strong>Scratch</strong> <strong>Day</strong> website has a media page, which allows you to connect with<br />
other <strong>event</strong>s via <strong>Scratch</strong>, <strong>Scratch</strong>Ed, Flickr, Twitter, and Youtube. Make sure you designate someone to be the<br />
photographer or videographer, if you won’t be able to do it yourself. This will make it easy to share your <strong>event</strong><br />
with your participants and with the <strong>Scratch</strong> community.<br />
What did the participants think of your <strong>event</strong>?<br />
You’ll have ideas about what worked or not, but you may be surprised by which activities were most popular.<br />
Getting feedback from people may give you new insights into your <strong>event</strong>. For larger <strong>event</strong>s, there are great<br />
tools like SurveyMonkey that enable you to create online surveys that you can send to participants.<br />
15
conclusion<br />
We hope that this <strong>guide</strong> will help you host an awesome <strong>Scratch</strong> <strong>Day</strong>! We have provided you with some<br />
resources, but the best resource is other <strong>event</strong> organizers just like you. On the <strong>Scratch</strong> <strong>Day</strong> website, you can<br />
communicate with other organizers and get tips and ideas from past <strong>event</strong>s. If you have any questions or<br />
comments for how the <strong>Scratch</strong> team could better support you on your <strong>Scratch</strong> <strong>Day</strong> adventure, please do not be<br />
shy in sharing your feedback!<br />
16
hand-outs<br />
This section provides you with more resources that will help you make your <strong>event</strong> a success. First, you will find<br />
two sample agendas for workshop <strong>event</strong>s. Even if your <strong>event</strong> is not a workshop format, these agendas may<br />
provide you with an outline for how to develop your <strong>event</strong>. Second, you will find the handout for the “find<br />
someone who” icebreaker activity. Feel free to adapt this format to reflect the personality of your community!<br />
Lastly, the <strong>Scratch</strong> cards are designed to help new <strong>Scratch</strong>ers get started.<br />
17
sample agenda 1<br />
1 hour workshop for small group of <strong>Scratch</strong> beginners<br />
Welcome and goal setting (5 minutes)<br />
Meeting one another: Name Game (10 minutes)<br />
Going around the room, participants introduce themselves.<br />
Introducing <strong>Scratch</strong> (5 minutes)<br />
In preparation for the hands-on activity, facilitator demonstrates:<br />
+ how to snap blocks together<br />
+ how to make a sprite move and say something<br />
+ how to add another character<br />
Creating projects: Collaborative story (25 minutes)<br />
Each participant spends 10 minutes starting a story in <strong>Scratch</strong>, passing the story on to another participant at<br />
the end of the time block. The next participant has 10 minutes, then the final person has 5 minutes to finish the<br />
story.<br />
Sharing experiences: Show and tell (10 minutes)<br />
Participants review their own and their neighbors’ stories and share their observations about <strong>Scratch</strong>.<br />
Preparing for next steps (5 minutes)<br />
Facilitator introduces the <strong>Scratch</strong> online community, shows some sample projects, and closes by answering<br />
questions.<br />
18
sample agenda 2<br />
2.5 hour workshop for beginner <strong>Scratch</strong> educators<br />
Welcome and goal setting (5 minutes)<br />
Meeting one another: Find someone who (15 minutes)<br />
Using the sheet, participants find others to sign their grid’s blocks.<br />
Introducing <strong>Scratch</strong> (5 minutes)<br />
Facilitator demonstrates the fundamentals of <strong>Scratch</strong> by showing how to snap blocks together.<br />
Creating projects: 8 blocks (20 minutes)<br />
In pairs, participants create a project using only eight pre-specified blocks.<br />
Sharing experiences: Show and tell (15 minutes)<br />
Participants review their own and their neighbors’ projects, and share their observations about <strong>Scratch</strong>.<br />
Introducing <strong>Scratch</strong> (20 minutes)<br />
Facilitator introduces the <strong>Scratch</strong> online community, showing a collection of sample projects to demonstrate the<br />
variety of projects that can be created with <strong>Scratch</strong>. Then in preparation for the next hands-on activity,<br />
facilitator demonstrates how to use <strong>Scratch</strong> to create an interactive postcard.<br />
Creating projects: Interactive postcard (40 minutes)<br />
In pairs or individually, participants create an interactive postcard for a place they’ve been or would like to go.<br />
Sharing experiences: Lessons learned (20 minutes)<br />
Participants review their own and their neighbors’ projects, and share their observations about <strong>Scratch</strong> to<br />
generate a list of suggestions for other educators.<br />
Preparing for next steps (10 minutes)<br />
Facilitator introduces the <strong>Scratch</strong>Ed online community, shows the different areas (stories, resources, discussions,<br />
members), and closes by answering questions.<br />
19
FIND SOMEONE WHO<br />
Get to know other participants by finding a different person to sign each block on your page.<br />
came to the<br />
workshop by<br />
car<br />
has lived in<br />
two other<br />
cities<br />
has met<br />
someone<br />
famous<br />
has recently<br />
been on<br />
vacation<br />
is completely<br />
new to<br />
<strong>Scratch</strong><br />
draws or<br />
paints as a<br />
hobby<br />
loves hot<br />
weather<br />
has been to<br />
the workshop<br />
venue before<br />
owns a pet<br />
loves to play<br />
board games<br />
with friends<br />
has taught<br />
someone else<br />
to use<br />
<strong>Scratch</strong><br />
has used a<br />
<strong>Scratch</strong><br />
sensor board<br />
speaks<br />
another<br />
language<br />
has taught<br />
someone how<br />
to ride a<br />
bicycle<br />
teaches high<br />
school<br />
students<br />
is currently<br />
reading a<br />
novel
What can you build with these 8 blocks?<br />
What can you build with these 8 blocks?
Interactive Us<br />
Create a project that helps others learn about you<br />
and the people, issues, and things you care about.
LET’S PLAY!<br />
Games provide numerous opportunities to explore a variety of computational concepts and skills.<br />
Here are some blocks that are frequently useful in games.<br />
TOUCHING<br />
See if two sprites are touching or<br />
if a sprite is touching a color<br />
TIMING<br />
Have the computer keep track of<br />
time for you<br />
COMPARE<br />
Compare values to help make<br />
decisions within your game<br />
VISIBILITY<br />
Make a sprite appear or disappear<br />
STRINGS<br />
Test, access, and change words<br />
and sentences<br />
KEY PRESS<br />
Make a sprite respond when different<br />
keys are pressed<br />
RANDOM<br />
Get a computer-generated number<br />
from within a specified range<br />
VARIABLES<br />
Store a number or string in a<br />
container to access later
day.scratch.mit.edu