William a U.S. native and graduate of the university of Chicago in business and structural engineering, starting his own company in the building and construction industry at a young age and was a real estate investor over 30 years in business until 2008 economic collapse. Retired in Mexico now, has been teaching countless Classes with international students from around the world. He is a polymath of knowledge and conversational expert in all fields of endeavor, with a vast hands on experience teaching all levels, he is certified and will help you in are relaxed environment. Covering all English exams and advancement of Knowledge and career.