"My name is David L. and I have taught physics for 33 years (the last 27 years as the full-time physics teacher at a High School). I have also taught physics part-time at the university level at Sonoma State University. Throughout this time, I have tutored physics as well. My approach is upbeat, encouraging, and aimed at deep understanding of the physics concepts. I have a wealth of knowledge of physics and have taught and tutored over 3,000 physics students (at least four of whom are now also su"