As an educator, over the years, you wonder if you are actually making a difference daily. Are you increasing the production of students’ dendrites? Every teacher unconsciously looks for the student, usually the (static) ‘smart one’, to see if learning is occurring; or to verify that all actions towards learning isn’t futile.
I charge teachers to select not the brightest but someone (dynamic) else to target learning goal/objective achievement. This is the ‘litmus’ student. The best one would be selected randomly each day or each quarter. Just a quick informal feedback to self to see what is really going on in the classroom.