As soon as the class meets, the pupils should take the measurements for
their aprons. One measurement should be assigned at a time, and the
reason for each measurement should be given. The pupils should have
explicit directions as to the measurements, as they are apt to become
confused if the directions are not clear. They should work carefully, so
that the material does not become crumpled or soiled and, at the
conclusion of the lesson, they should fold it carefully and put it away
neatly. All threads and scraps of material should be carefully picked
off the floor and the desks, and the room left in order.