“…Conversely, the textbook might not include certain information they feel is important for the students to learn, so they will supplement textbooks with other materials in order to "customize" the course (Baker, Thierstein, Fletcher, Kaur, & Emmons, 2009;Harley, Lawrence, Krzys Acord, & Dixson, 2009 (Laurence, 2002;Bodie, 2007;Coffin, 2012). They can add their own commentary and annotations and make them available to the students in the course, or to the public at large (Laurence, 2002).…”