He always tries to understand my business situation and help me with how to do. I am very busy and request to change the date for the lesson, he is very flexible to do so. When I feel tired with the ways of lessons, he changes the text books/materials/topics in order for me to dedicate myself to study English. He is a very knowledgeable tutor to teach the native American English accent to non native English speakers.
Teacher Charles' knowledge is excellent and strong in many fields; so, in this sense, the tutoring with him, is very productive in many topics. In my specific case, he helped me giving me a new and different approach to Business English, and also to handle in a better way the anxieties and insecurities in business presentations, and corporate meetings. I highly recommend teacher Charles!
Great teacher! Explanation are clear. Mark uses a variety of teaching methods. He shows an individual approach to students. Mark ls perfect in teaching both general and business English.