I teach Biology, Chemistry and Math for secondary students (Grades 10, 11, and 12). My tutoring strategy is making the student understand the course and then practice as mush as possible. After making sure that the student has understood every single detail from the lesson, a summary will be given to him prepared by myself to ensure that the student focuses on the important ideas before doing his/her exam. I guarantee success due to the fact that I've seen my previous students acing their exam and sometimes they even don't need a tutor anymore once the student has built a strong scientific base in his head.