Play it as a class

It is scored on The Price Is Right's One Bid rule, which is fifty years old and which everybody's parents already know: closest without going over. Everyone's opening guess is their bid. They commit once, blind, and the board is the reveal.

A room where every single bid went over has no winner at all. That happens more often than you would expect, and it is the best moment the mode produces: the entire class assumed something cost more than it does, and the board is the proof.

Nobody sees the board until they have bid, including you. A room full of guesses brackets the real price between the highest bid under it and the lowest bid over it, and with thirty students that bracket is tight enough to be the answer. So play first, then project it.

The spread is the lesson, not the answer. Ask why the guesses clustered where they did before you show the real figure, and you have a discussion about exchange rates, wages and what people assume about a country they have never been to.

Three questions that work on almost any day's puzzle. Why would this cost more here than at home? Who decides that price, a market or a government? And how long would someone there work to buy one, which is the figure the reveal gives you and the only one that needs no exchange rate to understand.

Every price in the game names its source, and the methodology page says plainly which numbers are solid and which are ballpark. That is worth showing a class too.

A room is a four-character code and a date. There is no roster, no email address, no password and no account. The board holds the display name each person typed and that day's bids, and rooms are deleted on a timer.

Names are typed by students and shown to the room. There is no profanity filter, deliberately: a word list would fail at policing thirty teenagers across every language this site is read in, and would break real names while failing. You can see the whole board, and a room lasts one lesson.