From time to time during the last few years other lists of words have
been organized, all with the view of conserving the time given to
spelling by requiring the pupil to learn to spell only those words for
which he has an immediate or a probable future use. There has also been
an attempt on the part of a few of the organizers to determine the
difficulty of the lists as was done in Boston. Such lists have been
organized in St. Louis and Kansas City, Missouri, and in other places,
notably in the state of Iowa.