If students are not taking interest in your teaching, then you will

If students are not taking interest, you should review your own teaching method.

Falling interest is often feedback that the approach or pace needs change.

Ignoring them abandons your responsibility for their engagement.

Leaving the class is an unprofessional retreat that solves nothing.

Merely asking them to pay attention treats the symptom, not the cause.

This reflective response embodies the idea of the teacher as a reflective practitioner.