There are many different ways in which you can adopt, adapt or create reusable course material as shown below.
Oedipus Rex audio
used for
Introduction to Biology
OER option for Bio-121 textbook
Try College 101
Saylor academy course
Editable, Downloadable slides, tests & more supplement
OpenStax peer reviewed
Light and Matter
created by Benjamin Crowell
print on demand at Lulu
adopted by University of Hartford