Python lesson 23: Project: a quiz program

What your child will learn

Learning goal: store questions and answers in lists.

Success looks like

• I can store questions and answers in lists.
• I can loop through the questions and keep a score.
• I can compare answers fairly with lower() and strip().

Key words

list · index · score · validation

What to have ready

• A device with a web browser (the code runs in the browser – nothing to install)
• Paper for tracing
• A keyboard helps for typing code (a tablet or phone works too)

The big ideas (for the adult)

Keep the questions in one list and the answers in another; the same index links them.

Set score = 0 before the loop; add 1 inside it when an answer is right; print the score after.

Tidy answers with strip() and lower() so " Paris" and "paris" both count.

Worked example

score = 0
answers = [5,40,13]
right = [3 * 2, 8 * 5, 2 * 7]
for i in range(3):
    if answers[i] == right[i]:
        score = score + 1
print("Score:", score)

It prints:

Score: 1

The lesson, step by step

Checklist for the project (teacher or parent)

The questions in this lesson are graded by Classfern. The program your child makes at the end is judged by you, with this checklist – it is not graded by computer. For each line, choose the description that fits best.

• Planning: the steps were written down before coding
  No plan → Some steps written → A clear plan that was followed
• It works: the program does what the plan says
  Does not run → Runs, with some bugs → Works for normal inputs → Works for normal and edge inputs
• Testing: different inputs were tried, including edge cases
  Not tested → Tested once → Several tests, including an edge case
• Readable: clear variable names and helpful comments
  Hard to follow → Mostly clear → Clear names and comments throughout