Fractions you can see and touch
A fraction is easiest to grasp when you can see it. This tool draws a pizza and lets a child tap slices to build a fraction: the numerator counts the slices they pick, the denominator is the total number of parts. Cut the pizza into anywhere from 2 to 12 pieces, and the fraction updates as slices light up — and it even reads the fraction out in words, like "three quarters".
Compare and find equivalents
Switch to Compare mode to place two pizzas side by side. Fill each one and the tool shows a less-than, equals or greater-than verdict, so a child can discover that two different-looking fractions — like one half and two quarters — cover exactly the same amount of pizza. Seeing equivalence this way builds intuition long before rules about common denominators.
For home and the classroom
Tap or use the keyboard, with every slice labelled for screen readers. It cuts into halves, thirds, quarters and more, shows when a fraction simplifies, and collects no data — a friendly first step into fractions, equivalence and comparison.
For parents and teachers: a visual introduction to fractions and equivalence, best paired with guided practice.
Frequently asked questions
What ages is it for?
It suits children around ages 7 to 11 (roughly second to fifth grade) meeting fractions, equivalence and comparison.
Does it show equivalent fractions?
Yes. In compare mode it reveals when two fractions are equal, and in single mode it notes when a fraction simplifies, such as 2/4 being the same as 1/2.
How do pizzas help explain fractions?
A pizza cut into equal slices shows fractions clearly: one of four slices is 1/4, two slices is 2/4, which is the same as one half.
How do I show equal fractions with a pizza?
Two quarters cover the same amount as one half, and four eighths cover one half too. Seeing the slices makes equivalent fractions obvious.
Why do the slices have to be equal?
Because fractions describe equal parts of a whole. If the slices are different sizes, "one quarter" no longer means the same amount each time.