What is one of the essential functions of a substitute teacher?

Providing effective instruction is a fundamental responsibility of a substitute teacher. When a regular teacher is unavailable, the substitute is tasked with ensuring that the learning objectives set out for the lesson are still met. This involves delivering content, engaging students in educational activities, and facilitating a positive learning environment, all of which contribute to maintaining the continuity of education.

The other options do not align with the essential functions of a substitute teacher. Disregarding applicable laws and ignoring student safety undermine the educational process and can lead to serious consequences. While classroom management is important, it should not be the sole focus, as effective instruction entails balancing both teaching and management to create an optimal learning environment.