Scratch angle racers maths mission

Quick answer

You can use Scratch angle racers to learn about angles by making your character turn left or right to follow a path, and by measuring and comparing different angles in your race.

Learning outcome

By the end of this page, you will be able to measure and compare angles in a Scratch game, and use turns to guide a racer along a track.

• You can tell the difference between acute, right, and obtuse angles.
• You can use turn blocks to make your racer move in different directions.
• You can describe how many degrees your racer turns using numbers.
• You can play a game that uses angles to move a character around a track.

Why this matters

Angles are everywhere in the world around you. When you play football, you turn your body to kick the ball. When you drive a car, you turn the steering wheel. In games like Scratch, you use angles to make characters move in the right direction. Learning about angles helps you understand how things move and how to build cool games.

How it works

When you make a character in Scratch turn, it moves through an angle. You can tell how far it turns by the number of degrees. A full turn is 360 degrees. If your racer turns 90 degrees, it turns a quarter of the way around. If it turns 180 degrees, it turns halfway around. You can make your racer turn left or right using the turn blocks in Scratch. You can also use numbers to make it turn more or less.

For example:

1. Start a new Scratch project.
2. Add a racer character.
3. Use the "turn 90 degrees" block to make it turn right.
4. Use the "turn -90 degrees" block to make it turn left.
5. Make it turn 180 degrees to go backwards.

Examples you can see

Imagine you're racing a car on a track. The car starts by going straight ahead. Then it turns right at a 90-degree angle. That’s like a corner in a room. After that, it turns left at a 45-degree angle. That’s a smaller turn, like looking to the side. Finally, it turns right again at 135 degrees. That’s a big turn, almost like a U-turn but not quite.

Here’s how it looks in a table:

You can use these turns to make your racer move around a track. You can even make a track with different angles to challenge yourself.

Try it as a mini adventure

Let’s go on a Scratch Angle Racers Mission! Your goal is to help a racer complete a track by turning the right angles.

Adventure Mission:

1. Start your racer at the beginning of the track.
2. Make it turn 90 degrees to the right to go around the first corner.
3. Then make it turn 45 degrees to the left to go around the second corner.
4. Next, make it turn 180 degrees to go backwards to the start.
5. Finally, make it turn 135 degrees to the right to finish the race.

Can you draw a map of the track with these turns? Try to draw the angles with a ruler and a protractor, or even use your hands to show the turns!

Common mistakes

• Mistake: Thinking that turning 90 degrees left and 90 degrees right means the racer goes back to the start.

  Why it happens: It's easy to think that turning the same number of degrees in opposite directions will bring you back to where you started. But turning 90 degrees left and 90 degrees right makes a corner, not a straight line.

  Fix: Try turning 180 degrees to go straight back.

• Mistake: Using negative numbers for turns without understanding what they mean.

  Why it happens: Some kids get confused when they see negative numbers in Scratch. They think it's wrong to use a minus sign.

  Fix: Remember that a negative number means turning left. A positive number means turning right.

• Mistake: Not knowing how to measure angles.

  Why it happens: It can be hard to see how big an angle is without a tool like a protractor.

  Fix: Use your hands or a ruler to help you guess angles. You can also make a chart to help you remember.

Parent and carer guide

Help your child understand angles by playing with them at home. You can make a simple game using a toy car and a piece of paper with angles drawn on it. Ask your child to tell you how many degrees the car should turn at each corner. You can also use a protractor to measure angles together.

Ask questions like:

• What angle does your racer turn?
• Can you show me how a 90-degree turn looks?
• How many degrees are in a full circle?

Remember to keep the focus on fun and exploration. If your child gets frustrated, take a break and come back later. It’s okay to make mistakes – that’s how you learn!

Practice questions

1. What is the difference between a 45-degree turn and a 90-degree turn?
2. If a racer turns 180 degrees, which way is it facing?
3. How many degrees does a full turn have?
4. Which way does a racer turn when you use a negative number?
5. Can you name one real-life situation where you use angles?

Answers:

1. A 45-degree turn is half the size of a 90-degree turn.
2. It is facing the opposite direction.
3. 360 degrees.
4. It turns left.
5. Examples: turning a steering wheel, looking at a corner, or playing football.

FAQ

What is an angle in Scratch?

An angle in Scratch is how much a character turns. You can measure it in degrees. For example, a right turn is 90 degrees, and a full turn is 360 degrees.

How do I make my racer turn in Scratch?

You use the "turn" block in Scratch. You can type in a number of degrees to make it turn left or right.

What are acute, right, and obtuse angles?

An acute angle is less than 90 degrees. A right angle is exactly 90 degrees. An obtuse angle is more than 90 degrees but less than 180 degrees.

Why are angles important?

Angles help us understand how things move and how to build things. They are used in games, sports, art, and even in building bridges.

Can I use angles in other games?

Yes! Many games use angles to make characters move. For example, in a racing game, you use angles to make your car turn. In a puzzle game, you might use angles to solve a maze.