One of the problems we encounter while teaching
differential equations is that many students do not have the mathematical
skills which are essential for success. This is true even though
the prerequisite courses (Calculus I, II, and III) have been passed.
To address this problem, the Mathematics Department of the University
of Arizona decided to do the following. Write a computer program
which a student can use before starting ODEs. This program would
quiz the student on all sections of calculus which are essential
to ODEs(i.e. logs and exponents, differentiation, integration,
and power series). The whole purpose of the program would be to
hone the student's skills in those parts of calculus which are
essential for success in ODEs.
(from the documentation)