This section is from the book "School Needlework. A Course of Study in Sewing designed for use in Schools", by Olive C. Hapgood. Also available from Amazon: School Needlework: A Course Of Study In Sewing Designed For Use In Schools.
1. At the right end of the crease, lay a half-inch fold between the thumb and forefinger of the right hand.
2. Lay another over this, and so on, until all the cloth is folded.
3. Pinch the folds, and turn up the edge.
4. Turn the other side of the cloth towards you, and the sharp edge will serve as a line to sew on.
If the cloth has been well creased, pinching is seldom necessary.
What is a crease? What purpose does it serve in sewing? How should you hold the cloth in creasing? At which end should you begin? How is the edge turned? How is it creased? How should the edge of the fold look? After the cloth has been once creased, what should be done to the entire length? After turning up the edge, what should be done? Why?