Which of the following is a manifest function of schools?

Understanding when to speak up and when to be silent

Learning to read and write

Following a schedule

Knowing locker room etiquette

Learning to read and write

Explanation:

A manifest function is a recognized function that serves a primary purpose. Since the primary purpose of any school is to provide education to its students, learning how to read and write is a manifest function here because these are basic skills needed for further learning.

Understanding when to speak up and when to be silent, following a schedule or knowing locker room etiquette are latent functions (unintended consequences). These functions can be learned at schools but they are not the school's primary goal (which is to provide education that prepares one for the labor market).