Academic support centers in schools often develop study guides for their students, as do for-profit companies and individual students and professors. Once only found at local five and dime stores the internet brought about a new era of online sites with study material. Only CliffsNotes survived this transition to the internet. Examples of companies that produce study guides include Coles Notes, Spark Notes, CliffsNotes, Schism’s, Perm charts, and Study Notes.
Some high school teachers or college professors may compose study guides for their students to assist them with reading comprehension, content knowledge, or preparation for an examination. These study guides may be issued as an assignment to be completed or as a comprehensive selection of material assembled by the teacher.