Their motive is simple:
they seek to understand the material they are struggling with.
Each week I tutor children in Math and Reading at
the local Kumon Learning Center for 3-6 hours.
I will always do my best to work with him or her until they are confident with their skills.
- maybe use a different phrase other than "do my best" since you've already used it earlier.
This may
only be a small step towards my dream
of contributing to society, but I believe it is a good start.
I think you have just the right amount of elaboration 'cause the reader will have found out what you do and what you get out of it which I think are the key points. Good job.
Priscilla Leung