These are examples, but I have taught many classes related to math, science, and business...
I am a chemist/toxicologist with more than twenty years experience. I have a Ph.D. in Toxicology and a B.S. in chemistry. I enjoy solving difficult analytical problems and making challenging measurements, whether working with toxics like methyl mercury, aflatoxin, dioxin and uranium or measuring picograms of elements within space materials, dinosaur bones or human tissues. I enjoy challenges. My current research focuses on the quantitation of elements and elements bound to proteins in the human red blood cell. Please let me know if I can be of assistance or if you would like to form a collaboration with me...
I have been tutoring for many years. I have experienced and I have taught many math, and science classes. I enjoy teaching students and helping in their classes and with solving problems.