Beswitched - Kate Saunders

When Flora Fox's parents send their daughter off to boarding
school, they have no idea that the train will take her back to
1935.

On the journey Flora has a strange dream. She wakes
up without her laptop or her phone, wearing a hideous uniform with
ridiculous bloomers underneath. She is a new girl at St Winifred's,
where the rules are mad, the food horrible, and the hairiness
of the teachers unbelievable.

Her 21st century manners will
not be tolerated at strict St Win's - how will she ever survive and
find her way back to her own time? But there is a special reason
why Flora has been summoned to the past. It involves the tempestuous
girl who becomes her best friend...