Teaching your own language requires more qualifications than just being a native speaker with no relevant degree. I am a certified linguist with a Master's Degree in teaching Greek to foreigners and 15 years of experience in all levels and ages. I have worked since 2005 in multinational classes of 20 people, with children, but mostly I have tutored more than 100 people from around the world online and I am very happy to have helped dozens of students to speak or improve their Greek, to have confidence when they speak with their family or when they visit Greece and of course to succeed in exams.