I have 10 years experience tutoring maths and chemistry. I keep up to date with changes to the major exam boards (Edexcel/AQA/OCR) and closely follow the specifications for the content of my lessons.
I like to use lots of practice and past paper questions in lessons to help students be fully prepared for the style of questions in their exams.
In general, I like to use online whiteboards to work through calculation questions together, draw diagrams to aid understanding, etc.
Lesson styles may vary to suit each student's learning style and the topic being taught.