Hi. I'm not sure if this is the case in all schools, but could you please, please not use reading as a punishment.
I've seen this too many times, children are made to sit outside the classroom or are made to miss break times and instead, are sat in a corner with a book.
There's nothing productive about it and it just makes the child hate reading.
As an author, I'm begging you, please find another way to punish children.