Scratching the Surface: X & Y

Alphabets Sounds Video

share us on:

In this lesson, students are introduced to Scratch, a coding platform where they can control a cat’s movement on the screen using X and Y coordinates, similar to a grid. They learn how to use the “go to” block to position the cat at specific coordinates and discover how motion blocks can help track and return the cat to favorite spots, encouraging further exploration and creativity in coding.
  1. What do the X and Y coordinates tell us about the cat’s position on the screen?
  2. How can you use the “go to” block to move the cat to a specific spot?
  3. What happens to the motion blocks when you move the cat around in Scratch?

Scratching the Surface: X & Y

Exploring Scratch with the Cat

Have you ever played with Scratch? It’s a fun way to learn about coding by moving a cute cat around the screen! When you move the cat, you might notice some numbers changing at the bottom. These numbers are called X and Y positions, and they tell you exactly where the cat is on the screen.

Understanding X and Y Coordinates

Imagine the screen is like a big grid, just like a piece of graph paper. The X coordinate tells you how far left or right the cat is, and the Y coordinate tells you how far up or down the cat is. You can even add a special backdrop called “grid” to see these lines on the screen, which makes it easier to understand where the cat is.

Using the “Go To” Block

Let’s say you want the cat to go to a special spot on the screen. You can use a block called “go to” to make this happen. For example, if you want the cat to go to the point where X is -100 and Y is 100, you just click the block, and the cat will magically move there!

Magic Blocks in Motion

Here’s a cool trick: when you move the cat around, some blocks in the motion category will automatically update with the cat’s new position. This means you can easily bring the cat back to a favorite spot. Just grab the block, move the cat away, and click the block again to see the cat zoom back to that spot. It’s like having a teleportation button!

Keep Exploring!

We’ve just started to explore what you can do with Scratch. There are so many more fun things to learn and create. Keep experimenting, and you’ll discover even more amazing things you can do with the cat and other characters. Happy coding!

  • Have you ever tried moving the cat in Scratch? What did you notice about the numbers that change when you move it?
  • Can you think of a time when you used a map or a grid in real life? How is it similar to using the X and Y coordinates in Scratch?
  • If you could make the cat go anywhere on the screen, where would you send it and why? What would you like the cat to do once it gets there?
  1. Coordinate Treasure Hunt: Create a simple treasure map on a piece of graph paper. Mark a few spots with an “X” and assign each spot a set of X and Y coordinates. Ask the children to use these coordinates to find the treasures on the map. Once they find a treasure, they can draw a picture of what they imagine the treasure to be. This activity helps them understand how coordinates work in a fun and engaging way.

  2. Real-Life Coordinate Game: Set up a small grid on the floor using tape. Assign each square a set of X and Y coordinates. Have the children take turns being the “cat” and call out coordinates for them to move to. You can make it more fun by placing small objects or toys at certain coordinates for them to collect. This hands-on activity reinforces the concept of coordinates and spatial awareness.

  3. Design Your Own Scratch Scene: Encourage the children to use Scratch to create their own scene. Ask them to place the cat and other characters at specific coordinates and describe what is happening in their scene. They can use the “go to” block to move characters around and create a short story. This activity allows them to apply what they’ve learned and express their creativity.

Here’s a sanitized version of the provided YouTube transcript:

In Scratch, as I move the cat around, the numbers down here are changing and showing you the X and Y positions. I can get a backdrop called “grid” to help illustrate what the X and Y coordinates are. Suppose I wanted to use the “go to” block to bring the cat to a specific point over here, which is at X -100 and Y 100. Now, when I click the block, the cat goes there.

Another little tip: as I move the cat around, some blocks in the motion category automatically update. So, if I want to bring the cat to a particular spot, I can just grab the block. When I move the cat away, I can click that block to go back there. We’re just scratching the surface!

Let me know if you need any further modifications!

All Video Lessons

Login your account

Please login your account to get started.

Don't have an account?

Register your account

Please sign up your account to get started.

Already have an account?