July 14, 2018

1. Open up your internet connection and connect to “KCDC2018”. The password is KCDCR0cks! (The “0” is a zero)

2. Can’t connect? Raise your hand and a mentor in a green t-shirt will help you.

3. We recommend using the Google Chrome browser.

If you don’t know which programming language to start learning, we recommend Scratch (if Scratch is not to your speed, check out the typing.io link in the sidebar on the right).

You will need a parent or guardian’s help to create a Scratch login:

1. Click “Join Scratch” in the upper right-hand corner of the Scratch site.
2. Create a username that does not include your real name.
3. Think of a password that you can remember easily. You should have your parent or guardian write this down and save it.
4. Click “Next” and continue following the directions. You will need a valid email address (yours or your guardian’s) to continue.

Once you have a Scratch login, use the links below to build something awesome.

1. Are you brand new to coding? Start with Codecademy (recommended for 13 years & up) or Scratch (recommended for 12 years & under). Want to try building your own phone application? Check out App Inventor! Be sure to create an account and write down your username and password so you won’t forget!

2. Do you have a little coding under your belt? Are you ready to learn more? Check out these fun games:

• CodeAvengers – learn to build JavaScript apps
• CodeCombat -Learn how to code by playing a game
• CSS Diner -A game for learning CSS selectors
• Flexbox Froggy – A game for learning CSS flexbox
• Flexbox Defense – Another game for learning CSS flexbox
• Super Markup Man – learn html
• Untrusted – a user JavaScript adventure game

3. Were you working on a project from our last session? Feel free to continue on that, and ask mentors if you need any help!

4. Get started on the new project. We can’t wait to see what you create!

Mastery – Feeling masterful? Check out the requirements for our mastery badges. You can earn cool pins!

Previous Concepts:

• January: Variables
• February: Making Decisions: If-Then-Else
• March: Arrays and Lists
• April: Loops and Repeating Things
• May: Random
• June: Functions

Today’s concept: Events, Broadcast/Receive

Today we are going to flex our code-magic muscles and look at events, broadcast/receive (aka publish/subscribe). On a web page or in a game, clicking on a button requires an action or an event (let’s call it “on-click”); that action will broadcast a message (ex. “HEY! The red button was clicked!”) that another part of the program is listening for. Once that message is received, an action will take place (ex. “OK, I now know that the red button was clicked, so I will ignite the rocket”). In Scratch, you would use the “Events” blocks for “broadcast” and “receive.” In JavaScript, you might use the event for “onclick” and run a function.

In a way, this is like casting a spell. You say the words or make the right motion and the appropriate action takes place. I could say “Accio taco!” and wave my arms just so and a taco from my favorite taco stand would fly into my hands. ”

Accio taco” is the Scratch Broadcast or the JavaScript event.

The taco flying to me would be the Scratch “when I receive” or the JavaScript function.

Example in JavaScript

Events Garden

Examples in Scratch

1. Example “Summon Taco“
2. Molly M. “My Virtual Garden“
3. Olivia N. “Grow an Apple Tree!“

Did you create something awesome based off of today’s theme/concept? Come present it on stage! Presentations will start at 11:30 am. At 11:15, come see Mentors Anri and Eric to get a place in line to present. Scratch projects that will be presented will be added the CoderDojoKC July 2018 Studio by a mentor.

Your assignment today is to build something awesome that uses at least one keypress event and one broadcast event. Have fun!

**Presentations may not contain any politics, violence, gore, or bad words. (And we’re counting “sucks” as a bad word!)