Since 8.5 by 11-inch paper can be more plentiful than square paper, it is appropriate to teach students how to make a square from a rectangular, non-square piece of paper. One way to explain this follows:

- Fold the short side over against the long side. This marks the length on the long side that you want to keep. A square is a rectangle with equal sides and so this will produce a rectangle with all sides equal to the original short side.
- Fold the extra part over. Unfold and fold in the other direction. This weakens the paper along the marked line.
- Carefully tear the extra part off.

The sketch was done with Paint Shop Pro.