Follow up after exams
It's considered best practice to follow up on your students’ successes after their final examinations. There's great satisfaction to be had in knowing that a student has improved their grades as a result of your help as a tutor. By following up after exams, you have an indication of how helpful your services have been, but it’s also a great way of building a reputation as being an effective teacher.
Likewise, it's recommended that you contact your students on the day they receive their exam results in order to confirm how they have done.