How do you divide a pizza fairly?

Four people are going to share a pizza. One wants half the slices, another a third; someone else says, "I'll take two small slices, that's the same as one big slice." Who's right, and who ends up eating more? At school, fractions are taught like a list of rules, but at heart they're the answer to an everyday problem: dividing a whole fairly.

On this journey you'll first see what it means to divide a whole into equal parts, and why unit fractions matter so much. Then you'll discover that fractions that look different can show the same amount: why 1/2 and 2/4 are the same piece of pizza.

Next you'll compare and order the pieces, and finally add and subtract them. Once you've seen on the pizza model why adding 1/2 and 1/3 doesn't give 2/5, you'll never need to memorise that rule again.