Here are two chocolate bars, the very same size. Katie ate one half of the first bar. Seán ate two quarters of the second bar. Their friend says, "That's not fair, Katie got more!"

Is the friend right? Did one of them really get more chocolate than the other, or did they eat the very same amount?

The interactive shows fraction strips, each split into equal parts with some shaded. Watch where the shading ends on each strip and compare it to the one above. Where do the shaded ends stop?

Now we try one match together on the board. The top strip already shows one half. The bottom strip is split into quarters, with nothing shaded yet. Our job is to shade the quarters strip so its shaded part covers the very same length as our one half, then check that the two shaded ends stop in exactly the same place.