Introduction to the Math Quiz Game

• In this lesson, we will create an interactive math quiz game using Scratch.
• A sprite will ask random addition questions, and the player will earn or lose points based on their answers.
• A timer will limit the game duration, making it more exciting and challenging.
• This lesson helps students understand variables, random numbers, loops, conditions, scoring, and timers in Scratch.

What Students Will Learn

• How to create variables to store numbers, answers, score, and timer
• How to generate random numbers using the pick random block
• How to ask questions using ask and wait
• How to join text and variables to create a question
• How to use conditions with if then else
• How to increase or decrease score based on player input
• How to use forever loops to repeat actions
• How to implement a countdown timer
• How to stop the game when a condition is met

Creating Variables

• Create variables for the game:
  • number 1 → first number in addition
  • number 2 → second number in addition
  • correct answer → sum of number 1 and number 2
  • score → to track points
  • timer → to control game duration

Generating Random Numbers

• Under when green flag clicked:
  • Set number 1 to pick random 1 to 10
  • Set number 2 to pick random 1 to 10
• Explanation: Random numbers ensure every question is different

Calculating Correct Answer

• Set correct answer to number 1 + number 2
• This value is used to check the player’s input

Asking the Player a Question

• Use ask and wait from Sensing
• Create a complete question using join blocks:
  • “What is ” + number 1 + “ + ” + number 2
• Player types the answer, which is stored in the answer block

Checking the Answer

• Use if then else block from Control:
  • Condition: answer = correct answer
  • If correct:
    • change score by 1
    • say “Correct! Well done.”
  • Else:
    • change score by -1
    • say “Incorrect, try again.”

Repeating Questions Continuously

• Wrap the ask and check answer logic inside a forever loop
• This ensures new questions appear continuously until the game ends

Adding a Timer

• Create a timer variable
• Set timer to 60 (seconds) under when green flag clicked
• Use a forever loop to:
  • change timer by -1
  • wait 1 second
• Explanation: Decreases timer every second

Stopping the Game When Time Runs Out

• Inside the timer loop, add an if block:
  • Condition: timer ≤ 0
  • Action: stop all
• Explanation: Stops the game automatically when the time is up

Scoring and Feedback

• Correct answers increase the score by 1
• Incorrect answers decrease the score by 1
• The sprite provides interactive feedback using say blocks

Advanced Ideas for Students

• Add subtraction, multiplication, or division questions
• Adjust the timer for a faster or slower game
• Add a win condition if the score reaches 10 or 15 before time runs out
• Include sound effects or animations to make the game more fun
• Make the questions more challenging by increasing the range of random numbers

Summary of What Students Learned

• How to create and use multiple variables
• How to generate random numbers
• How to ask questions using ask and wait
• How to join text and variables
• How to check answers using if then else
• How to increase or decrease score
• How to use loops to repeat actions
• How to implement a countdown timer
• How to stop the game when a condition is met

Task for Students

• Create your own math quiz game:
• Include addition, subtraction, multiplication, or division
• Adjust timer and scoring rules
• Add interactive feedback like sounds or animations
• Include a win or lose condition to make the game more exciting
• Challenge yourself by making the questions and timer faster