I’m a professional online English teacher. I have a university degree and an international certificate of advanced business English. If you wonder about the age of students, I ‘d say I prefer teenagers and adult ones. Once, I had two «young» ladies of 54 and 65 y.a. I guess, they’ve been the most advanced students in my experience up to now. Yet, most of them, of course, is much younger. The number of our students needs practice and preparation for different exams, such as FCE, CAE, IELTS, TOEFL. Naturally, I don’t use Russian or Ukrainian textbooks, coz they have plenty of grammar and vocab mistakes, also, there are just mostly plagiarised from original British and American resources. So, if it’s an academic course I use Real Life, English File, Total English, Activate, etc. I often combine, searching for best to a student’s specific needs. Judy Styles, my language teacher in University said: » Good teacher’s technique shouldn’t be predictable every lesson to motivate his learners. Remember, you don’t teach a book or plan. You are the instructors of learners driving. You don’t drive for them, as well as you don’t eat for them. You just show them, help them, correct them, and support them in THEIR effort to drive, eat, etc.» I love using short videos and songs in my teaching grammar and vocab.