Are ‘and some’ and ‘for everyone’ correctly used in the sentence?

Are ‘and some’ and ‘for everyone’ correctly used in the sentence?

If you look into Mrs. Jacobs’ class, it is a quiet one, but it is not a boring one. Her students may all be different from one another, but that is what makes her class distinct from other classes. Some of her students are too quiet, and some are too loud. Some choose to listen to discussions, while some want to speak. Some look as if they were aloof, but they are really friendly. Some often irritate or annoy the class, but they really care for everyone of us.