3.5 stars.
Admittedly, my rating might not 100% reflect the book, as I am not the age demographic it was written for, so take what criticisms I have with a pinch of salt.
I did enjoy this book, I thought the premise (although not unique (not that a story idea has to be)) was really fun and explored really well. I think it was really good to take a simple idea of a head teacher and a naughty student swapping bodies, and making the overall lesson not only that bad kids need to grow up and mature a little, but also that you don't always need to be 100% mature and boring, and that you are allowed to be childlike at times.
It was also nice to see the main character, a boy, have a best friend that was a girl. I know that in Britain (where this book is set), that it's honestly quite rare for people of opposite genders to be friends, especially at that age, most people just stick to their own gender. So that element was nice to see. And it was also nice to see how much Ryan cared for Dionna's feelings, since I know a lot of British boys like to pretend as if they don't care about anyone or anything, so I really enjoyed seeing how much Ryan cared for his friend.
Now, the main reason that the book is rated so lowly is mainly just because it is not in my age demographic. I did enjoy the book regardless, but I knew going in that it was never going to be my favourite thing in the world. As a child I would never have even thought about the point I'm about to make, but as I'm not a child, so I always found it funny when the teachers interacted with each other, as I know that's not how adults would talk to one another, but obviously it made sense to write it like that for a children's book, so that point was not taken into consideration when rating. I just thought it was funny to read. I mean, as some points I was just begging them to swear to once another, because they definitely would have in real life.
Another point I thought was quite strange, but not too out there, was when Miss Gerard was coming onto Mr Carter (but Ryan inside), basically begging him to have sex with her. I thought for a children's book that was a bit strange, but they didn't write it in those exact words, so I guess it wasn't too out there.
Okay, here's the thing I won't be lenient on, and that I thought was really weird and not necessary. When they were doing the debate against Oakcroft, and it was Toby's turn to do his speech, and he he didn't really say much of value, but the whole thing with him was that he was supposed to be dreamy and good-looking, and everyone would ignore his lack of words in favour for how pretty he was. Which is all well and fine if it's the kids, anywhere from 5 to 12-ish, swooning for him, but where I took problem was when the adult's began to be charmed by him. I mean, this is 40-ish year old people being attracted to an 11 year old, how weird is that? And it's not even as if it was necessary to the story, because Miss Malik, who was the main one to be charmed by him (and that was meant to be the whole point, that she was leaning towards Oakcraft winning because she liked Toby), then later on went against Oakcraft, saying that Toby's argument provided little value for the debate. So, there was really no need for an adult to be swooned by a child.
A good point though, after those negatives, I was happy when we learned that Mr Carter was Scottish. It's nice to see people from my own country in books.
Overall, I really enjoyed this book! Obviously not my favourite book in the world, but it was an easy and enjoyable read.