  In this article we discuss a procedure to solve the one dimensional (1D)
Schroedinger Equation for a periodic potential, which may be well suited to
teach band structure theory. The procedure is conceptually very simple, so that
it may be used to teach band theory at the undergraduate level; at the same
time the point of view is practical, so that the students may experiment
computing band gaps, and other features of band structure. Another advantage of
the procedure lies in that it does not use specific symmetry properties of the
potential, so that the results are generally valid.
