When students try to solve questions in a different way, not taught by the teacher from prescribed books, these students should be

Students solving questions in a different way should always be encouraged to consult other books on the subject.

Alternative methods and wider reading nurture independent, creative thinking.

Discouraging them from other books suppresses curiosity and original thought.

Requiring the teacher's permission before referring to books adds a needless barrier to learning.

Saying no action is required ignores a chance to reward and extend the student's initiative.

This aligns with divergent thinking, which values many valid paths to a solution.