The Center for Professional Development produces publications in several formats. All programs are accompanied by research-based and standards-compliant Course Materials. These materials are copyrighted and offered as part of the PD instructional program however, they are also offered for separate sale and are regarded as valuable, affordable references for educational practitioners. The CPD also maintains a Catalog of Practice Monographs. Practice Monographs are concisely written, practice guides that focus on single topics or issues and are often prepared by a single author.