Blog

Every Way to Make a Random Choice

A complete guide to every random-decision method on this site, and when each one is the right tool.

How Random Is a Spinner Wheel? The Fairness Math

The arc-proportion math behind a fair spinner wheel, and how true randomness differs from Math.random().

20 Classroom Picker Ideas Teachers Actually Use

Real classroom-tested ways to use a name picker, a spinner, and a team generator.

How to Run a Fair Giveaway on Stream

A streamer's guide to picking a verifiably fair winner from a chat or entrant list.

Dice Probability Basics for Board-Game Night

The real odds behind d6, d20, and multi-dice rolls, explained for non-mathematicians.

Secret Santa Without the Spreadsheet

How to run a fair, private Secret Santa draw without anyone seeing who has whom.

Why Math.random() Isn't Actually Random

The difference between pseudo-random number generators and cryptographic randomness, in plain language.

Best Icebreaker Games for Groups of Any Size

Icebreaker formats that pair naturally with a name picker or team generator.

How to Pick a Fair Giveaway Winner

A step-by-step method for running a defensible, transparent contest draw.

Party Game Randomizers for Game Night

How to use dice, wheels, and pickers to run better party games.

Back-to-School Classroom Tools for Teachers

A seasonal roundup of the classroom-friendliest tools on the site.

Coin Flip vs. Dice Roll: Probability Explained

Comparing the odds and use cases of a coin flip against a dice roll.

The Wheel Is a Social Object, Not a Number

Why a visible spin settles an argument that a number on a screen never will.

Why Your Class Thinks the Picker Is Rigged

Thirty students, thirty lessons, and the run of three that convinces a room the tool is broken.

In Defence of Randomness Theatre

The spin animation changes nothing about the result. Keep it anyway.

What a Million Simulated Flips Show

Running the streak simulator to its limits, and what the longest-run numbers actually mean.

Random Is Not the Same Thing as Fair

Equal chances and fair outcomes are different goals, and most disputes are about the second one.

The Hidden Cost of the Re-Roll

Every 'let's just do that again' quietly hands the decision back to whoever asked.

When Not to Use a Random Picker

Seven situations where reaching for a draw is the wrong instinct, from someone who builds them.

Why Your Shuffled Playlist Repeats Itself

A true shuffle clusters. Every music app quietly stopped using one, and told nobody.

The Secret Santa Problem Nobody Mentions

Add enough exclusions to an office draw and it stops having any valid answer at all.

What a Fair Rota Actually Looks Like

Fairness in a rota is about totals over months, not about who gets the bathroom this week.

Why We Built No-Repeat Memory

The most-requested feature on this site changes the odds on purpose, and that needed saying out loud.

How to Read a Probability Table

Percentages, odds, and 'one in n' say the same thing badly in three different ways.

What Streamers Get Wrong About Giveaways

The fairness problem in a stream giveaway is almost never the random draw.

Dice Superstition and the Tables That Keep It

Retiring a cursed d20 is irrational, harmless, and probably good for the game.

The Loudest Voice Should Not Pick Dinner

Group decisions default to whoever cares most visibly. A draw is the cheapest fix.

The Person Who Always Goes First

Fixed turn order compounds. Over a season it is worth more than most people assume.

Weighted Draws Are Honest, Rigged Ones Are Not

Unequal odds are fine. Unequal odds you did not announce are the problem.

Small Samples Lie, and So Does Your Gut

Twenty draws tell you almost nothing, and your intuition will insist otherwise.