Question

Why the student keep quite if his money is stolen in the classroom by its classmates

Answer 1

Because of
1. He/she not want his/her friends name and his attitude down.
2. Either he/she was a best friend forever.

Answer 2

1. He might think that it is a little amount.
2. He might doesn't want to make it an issue.
3. He might know that who has stolen his money and the one may be his friend.