One of the best teachers I have had the good fortune to observe is my husband. I have had the good fortune to have observed his work as a stage 1 and stage 3 primary teacher and as a high school TAS teacher.
He is no academic & without my help, would not have made it through Uni. But put him in front of students and he was an expert.
I would ask why he did a particular activity, chose an approach or broke down a concept; his reply would be, “that’s just the common sense way to do it.” He was a natural and it is just common sense to him, but not to all. His data backed this up.
My husband got the 2nd lowest result of his HSC cohort. As an aside, his best friend, who got the lowest mark is now a very successful expat living in Dubai.
Band 5s and ATARs are not a measure of your success as a teacher (or anything else). Some can be taught how to teach and others are naturals in spite of their HSC results. I am unsure how to get the best of both ends of this spectrum, other than the fact that the current method may be excluding the naturals.