[iaw]

I have a family member who was hired as an Emergency teacher over 20 years ago. They've since become fully credentialed, obtained their masters in education, taught masters students, and organized a particular program/subject at the district level.

Speaking with them, their experience has been the core driver of a successful teacher is primarily whether they want to be there and care about the students success.

Of course, when they were first hired they spent all of their free time crafting lessons plans for a subject they basically failed in high school. Studying the textbook and relevant material so they could teach it.