I have a TEFL certificate and I can teach adults and students.

My method is simple. I first plan a lesson based on a specific subject. I then make a presentation in case there is no course book to teach from. During the time of the lesson, I will give students dialogue or other materials to practice. After a couple of minutes, we then do a Q&A where they talk in English and then I may need to correct their responses if necessary. At the end of session, I just summarise the lesson.