Here is a line that starts at 0 and ends at 1. Where would one half live on this line? Closer to 0, closer to 1, or right in the middle? Show me with your hand where you think it should go.

The interactive shows lines from 0 to 1, split into equal steps. Watch where each fraction lands, and keep an eye out for two fractions that end up in the same place.

Now we place three fractions together on the same four-step line, in this order: one half, then one quarter, then three quarters. The line stays split into four equal steps the whole time. Each time we count the equal jumps from 0 before we check. We will save one third for the Class Challenge, because that fraction needs a different line.

Now we work through these placements together, one at a time: place one half, then one quarter, then three quarters. Count the equal jumps from 0 each time, then press Check to confirm before moving on. For the last one, one third, the line changes to three equal steps instead of four, so the marks sit in new places. Predict where one third will land before you drag.