Draw a name
Use nicknames or anonymous labels when projecting a class list. Turn off replacement if each person should be selected once. Random selection can support participation; allow students to pass.
Classroom resources
Classroom randomizers & printable probability activity
Pick names, make teams, and teach probability with free browser tools. Download a two-page coin experiment with a student worksheet and teacher notes.
A 15-minute coin experiment
Predict, test, discuss
- Predict how many heads you expect in ten fair flips. Write the prediction before generating any results.
- Open the ten-coin tool. Generate ten batches, recording the heads in each batch. Keep every batch, including surprising results.
- Compare 100 flips with the expected 50 heads. Discuss why an expectation is not a guarantee, and why the next flip is still 50/50.
Download the worksheet (PDF)
Flip 10 Coins — Multiple Coin Toss SimulatorTwo pages: student activity and teacher notes. A4, printer-friendly.
Choose a classroom tool
Build teams
Paste one participant per line, choose the number of groups, and generate. Check access needs and adjust roles before starting the activity.
Explore coins
Compare a prediction with a sequence of independent flips. Use small batches first, then combine class results to discuss sample size.
Why 50 heads is not guaranteed
For 100 independent fair flips, the expected count is 50 heads. The probability of exactly 50 is about 7.96%. Repeating the experiment shows variation around the expectation.
Read the full probability lessonTeacher demo: 60 seconds
0–15 s: ask for a prediction. 15–35 s: generate ten coins and count the heads. 35–50 s: record a second batch. 50–60 s: ask whether tails is now “due”. Each flip remains independent.
Put a generator on your lesson page
Use the public embed guide to copy an iframe. No account or API key is needed.