- Chapter Zero, Carol Schumacher
- A TeXas Style Introduction to Proff, Ron Taylor, Patrick X. Rault
- Number Theory Through Inquiry, Marshall, Odell, Starbird
- The Heart of Mathematics: An Invitation to Effective Thinking, Burger, Starbird
- Essentials of Mathematics: Introduction to Theory, Proof, and the Professional Culture, Margie Hale
- Functions in Mathematics: Introductory Explorations for Secondary School Teachers [Paperback]. Mark Daniels (Author), Efraim P. Armendariz (Author)
- Euclidean Geometry: A Guided Inquiry Approach by David M. Clark, co-published by the American Mathematical Society and the Mathematical Sciences Research Institute, Math Circles Library (2012). For information about its content and use contact the author at <clarkd@newpaltz.edu>
- Synthetic Geometry by R. F. Jolly, Holt, Rinehart and Winston, Inc. (1969).
- Discovering the Art of Mathematics, Westfield State University
