What follows a prepositon?

The noun phrase or pronoun that follows the preposition is called the object of the preposition. Sometimes adjectives modify the object of the preposition, as in “behind the big old smelly green couch.” Examples of the object of a preposition include: about my homework.

Explanation:

either online or traditional classroom can work for students. which is better will depend on students and teacher. students may have trouble following a lesson in classroom while they can study at their own pace online. other students may have trouble staying focus on their own in online classes. teachers are more used to classroom teaching but they may also be more worry about their jobs teaching online classes and work harder.