Be prepared. You need to understand that even in high school, there is more than one accounting class taught. Talk to the teachers at the local high school to find out which ones you want to tutor in, or you may be able to tutor all of them.
Talk to the teachers about the students who need the most help in their class. It is possible that they have already approached the parents and students, and they both think having an accounting tutor may be the best thing. Sometimes, kids just can't grasp the principles when they are in a class, but a little one-on-one helps them see the light.
Get together with the students. See which ones you have a rapport with--this is necessary in a tutoring situation. If you and the student can't connect, you won't do him any good.
Meet with the parents and students and set up a schedule. If the student, parents and tutor are all in agreement, then you should make arrangements to tutor when it is best for everyone's schedules.
Change your methods. If you find one approach isn't working, be prepared to change to a different approach that the student can relate to. You may be tutoring several students at different times and find what works for one won't work for all. So be ready to change your methods for each student if it is called for.
Give the students all the help they need, and you will find that you are an excellent accounting tutor. The important thing to remember is that you want to make sure the student's grades increase--when they do, you know you are succeeding as an accounting tutor.