Teacher-Scholar Institute
"Propagating Matters Mathematical"
  See our new concise trigonometry book here.
Introductory Lectures
Free Math Books, College Level
Free Math Books, High-School Level
Dr. deLaubenfels' Résumé
How to Contact Us

Ralph deLaubenfels and Karen deLaubenfels formed Teacher-Scholar Institute in 2009. The designation "teacher-scholar" reflects the belief that teaching and research (in the subject matter being taught - not "education research") are symbiotic. This is particularly true in mathematics, since the primary purpose of mathematics research is expository: clarification, unification, and simplification.

Dr. and Mrs. deLaubenfels have home-schooled their three children K-12.

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