I remember reading this book back when I was in high school when I just first started out in 2012-2013. It was part of a series. I can't remember a whole lot about it. I believe the cover wasn't a hard cover but a flexible one and there was more than three books in the series.
It was about a group of teens that take a special class in high school for their special abilities and no one knows about their special abilities except for the teacher. Pretty much a safe place for them. Every new book changed the main character to another character from the classroom.
I can't remember what the teenagers (both genders) looked like but I know they were from all different social groups in high school and they did fight off bad people I think or some sort of evil. I believe one student had a power of shape shifting or taking over a body. One could read minds. One was able to become invisible. They were a part of this class to control their abilities too.