This was actively discouraged by the instructors in the school I attended. Not by policy, but by behavior - passive-aggressively belittling students for not “getting” the subject matter, showing a complete lack of interest in reciprocating any amount of getting to know the instructor.
> … ask follow-up questions, pursue independent research, or do anything approaching "apprenticeship". Most American students matriculate into college/uni not even having ingrained behaviors that make any of these things obvious or approachable …
A failure of secondary education and students’ families.