The Racing Angel. The Guardian Angels, #2

Seventeen-year-old Danny Usborne is killed on his motorbike when a race against his mate's car goes wrong. Danny then finds himself in the School for Lost Angels. Here he meets teacher, Richard, who sends him back to Earth to stop teenager Cassandra from crashing her mum's car on a joyride, and possible causing injury or worse. With persuasion and newly found magical abilities, Danny manages to prevent Cassandra from doing anything stupid.
Back at the School, Danny is told he has passed his first test, and he has got Cass and her mum talking. Then he sees that the school is like him, magical. He then meets Lizzie, who recognises him from her test. The school's purpose is explained to Danny and he is told that both him and Lizzie now have to pass their pair test. Then he finds he has started to grow wings. Danny can't wait to do his next text, with his wings and powers.