Random Classroom Experiment
A quick demo, ready to run.
A quick demo, ready to run.
Tap the big button. No accounts, no sign-up.
Sample outputs from Random Classroom Experiment
A slice of what this picker might return. The full pool is much larger — tap the picker for a random one.
- Vinegar and baking soda volcano
- Skittles rainbow in warm water
- Egg in vinegar (naked egg experiment)
- Grow crystals from salt water
- Testing paper airplane designs
- Non-Newtonian fluid — cornstarch and water
- Elephant toothpaste (hydrogen peroxide + yeast)
- Making a pinhole camera from a box
- Absorption rates of different fabrics
- Reaction time test with a ruler drop
- How gravity affects falling objects (feather vs coin)
- Testing pH with red cabbage indicator
When to use Random Classroom Experiment
- Cold-calling a random student without accusations of bias.
- Splitting groups fairly for group work or team activities.
- Reward selection at end of a good lesson or week.
- When you specifically want randomness — not a "recommendation engine", not a ranking, just an unbiased pick.
How the picker works
Random Classroom Experiment runs entirely in your browser — no servers, no accounts, no data sent anywhere. Each pick uses your browser's built-in cryptographic random-number generator (window.crypto.getRandomValues), which is uniformly distributed across the option pool.
The pool for this picker: 15 hand-picked options. Every option has an equal probability of being selected on any given pick (about 6.67% per option).
Picker-kind picks return a single random option from the pool. If you add your own options, they're weighted equally alongside the built-in set.
If you want a deliberately weighted pick (favouring some options over others), the picker isn't the right tool — try structuring the choice as a wheel with duplicated entries, or split into two picks (category first, then item within category).
Related pickers + when to prefer each
Random Classroom Experiment is one of several related pickers on the site. The rest of this cluster covers adjacent decisions:
Random Warm Up Activity — the closest neighbour when this picker isn't quite the right fit.
Random Mystery Object — the closest neighbour when this picker isn't quite the right fit.
Random Exit Ticket Prompt — the closest neighbour when this picker isn't quite the right fit.
Random Classroom Team Name — the closest neighbour when this picker isn't quite the right fit.
Random Classroom Song — the closest neighbour when this picker isn't quite the right fit.
All picks are independent — running one picker doesn't influence the others.
About this category
Classroom pickers are the highest-utility tools on the site. Teachers use them daily for cold-calling, group generation, brain breaks, reward selection and behaviour management.
Everything here is deployment-tested — TES-compliant, GDPR-safe (no student data leaves the browser), works on smartboards and tablets.
FAQ
Safety?
Standard classroom-safe with basic supervision.
You might also like
Random Warm-up Activity
5-minute starter, ready to run.
Hand-picked match
Random Exit Ticket
End-of-lesson formative check in 3 minutes.
Hand-picked match
Random Classroom Team Name
Kill the "we can't agree on a name" delay.
Hand-picked match
Random Mystery Object
Bag, object, questions from the class.
Hand-picked match
Behaviour Reward Picker
Reward consistency, not just the big wins.
Same category
Brain Break Generator
Reset the room in under a minute.
Same category
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