I'm David Lach, an EIT-certified mechanical engineer with both a Master's and Bachelor's degree from UMass Amherst. I've served as a teaching assistant for seven college-level courses across engineering, physics, and applied math, and I've mentored high school students in core subjects like algebra, calculus, and mechanics.

My academic and teaching experience spans a wide range of topics, including calculus, differential equations, classical physics, dynamics, thermodynamics, structural analysis, and MATLAB-based modeling. I specialize in helping students break through difficult conceptswhether it's mastering vector calculus, understanding Newton's laws in real-world systems, or solving engineering design problems step-by-step.

I believe in building deep conceptual understanding alongside practical problem-solving skills, tailoring each session to the student's learning style and academic goals. Whether you're tackling an introductory physics course or advanced engineering coursework, I'm here to help you succeed with clarity and confidence.