Zachary Fruhling is the creator and lead author of the successful Aplia homework solution for Patrick Hurley's A Concise Introduction to Logic. He is a former philosophy instructor at UC Santa Cruz, Cabrillo College, and Evergreen Valley College, where he has taught introductory logic, critical thinking, introduction to philosophy, philosophy of religion, ethics, and other undergraduate philosophy courses.

Zachary is currently a senior instructional designer for HotChalk, Inc. and the co-host of two weekly podcasts on the network:

Zachary is the co-founder of Doodle Dudes, LLC, and co-creator of "Doggie Doodle," a fun and simple dog-themed drawing app now available on the Apple App Store:

Zachary's other interests include genealogy and digitizing family history, music (piano, drums, and guitar), poetry, rose gardening, hiking and fishing in the High Sierras, and educational technology.