The Ten Main Classes of Dewey
000 • Computer science, general works, and information
100 • Philosophy and psychology
200 • Religion
300 • Social sciences
400 • Language
500 • Science
600 • Technology
700 • Arts and recreation
800 • Literature
900 • History and geography
To search for activity books and textbooks about a particular topic or subject area, combine a keyword with the phrase "textbooks and activity books".
For example: algebra "textbooks and activity books"