There are few categories of students and teachers/tutors/parents should follow different techniques to motivate them.
1. Annoying student: Can teach meditation tips.
2. Disabled students: Say real time positive stories.
3. Panic students: Teach them to get more confidence.
Hoping these tips would be helpful

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It is great experience to work as private tutor.

Nice tips however if you will get a proper environment where all students are doing good then your mind will also think about to do something.