Here is a fair six-sided die. If we roll it lots and lots of times, will every number come up about the same, or will one number win?

Hands up: which number do you think will come up most?

Watch the dice-roller. First one roll on its own, then a run of many rolls with a tally kept beside them.

On a single roll, nobody can say for sure what will come up. Watch what happens to the counts once we roll many times — the bar chart below shows the counts, and the taller a bar, the more often that number came up.

Today we test our guess together. First we all predict which number will come up most in twelve rolls. Then a pupil rolls the die twelve times at the board while the class keeps a tally: roll 1, roll 2, all the way to roll 12.

Now we move to the spinner and test our guesses again. This spinner is fair, with two equal colours. First we predict: will red or blue come up most over many spins? Then we spin many times and read the bar chart of the counts.