Most instructional material is well prepared and appropriate for the
level of the student.
Occasionally, of course, the instructional material is not well pre-
pared or is not appropriate to the level of the student. On those
occasions, the instructor or the student may overcome the poor
instructional material or may find alternative material that is well
prepared and appropriate for learning.
In general, however, the instructional material is not the source of
learning difficulties.