does this sentence use correct subject-verb agreement? My teachers often gives homework on the weekend.

No, the sentence does not use correct subject-verb agreement. In this case, the subject "teachers" is plural, so the corresponding verb should also be plural. The correct form of the verb would be "give" instead of "gives." To determine whether a sentence uses correct subject-verb agreement, you need to identify the subject of the sentence and make sure that the verb form agrees with it in terms of singular or plural.