Acumen Tutors

John Deubert: STEM subjects

Acumen Tutoring's STEM tutor is John Deubert.

John has been teaching nearly all his life. He worked his way through UC Berkeley teaching classical guitar. For a decade he taught physics, chemistry, and computer programming at the prestigious Castilleja School for Girls in Palo Alto, CA. He left Castilleja in 1984 to join a tiny start-up company named Adobe Systems. As Adobe’s 19th employee, John set himself the task of creating and teaching a training curriculum in the PostScript programming language.

Upon leaving Adobe, John spent the next two decades as a Mac and Windows software developer, meanwhile continuing to teach PostScript (and, later, PDF) classes throughout the world. Finally, in 2013, John hung up his PostScript spurs and, following his granddaughter’s advice, and took up tutoring math and science as Acumen Tutoring.

At the moment John has over 50 active students from many schools, both public and private, in southernmost Orange County.

A longer biography (there were some books written and some software awards received) is available here. That biography is written for the engineering crowd and supplies more detail than you probably want or need, though.

John can be reached at:


Barbara Deubert: English, history, writing

Acumen Tutoring's English and history tutor is Barbara Deubert.

Barbara has a lifetime's experience in all levels of education. She began her career as a high school and middle teacher of English in both public and private schools. After twenty years as a classroom teacher of history and English, she entered school administration, serving as middle school director at Castilleja School in Palo Alto, assistant head and upper school director at Westridge School in Pasadena, and elementary school principal at St. Margaret’s Episcopal School in San Juan Capistrano.

Barbara holds a B.A. degree in English from the University of Colorado/Boulder, an M.A. in education from the College of Notre Dame, and an M.A. in school psychology from Alliant International University.

A teacher and administrator of long standing with vast experience with all grades, kindergarten through high school, Barbara's love of English and history make her exceptionally qualified to help your student toward excellence.

Barbara can be reached at: