In the united states, schoolchildren are taught to stay quiet until the teacher calls on them, and to regulate their activities according to clocks or bells. this learning experience is an aspect of

The hidden curriculum, is the right answer.

Explanation:

The hidden curriculum is a theory which explains the often unarticulated and unresponsive things students are taught in school and which can make some impact on the learning experience of the students. Such curriculum are generally unspoken and intended teachings irrelevant to the academic programs they're practicing — things acquired from just being in school.

answer; i believe the correct answer is (4) flip a coin as each participant arrives,heads indicates assignment to the first group: tails indicates assignment to the second group;