Permissibility of accepting a gift after completing the work

Question: I teach the Noble Qur'an at a charitable organization. After issuing the certificates to the students, they present me with a collective gift. This gift does not affect the student's grade. Should I accept their gift?

Answer: If the gift is given after the completion of reviewing their grades, after the completion of the certificates, and after finishing the work at this organization, then there is no harm in that; due to the generality of the evidence regarding the permissibility of accepting gifts. And success is from Allah.