Into the Fourt at Trebizon Boarding School by Anne Digby

'Now Girls, one of you will just have to move out.'
 
Rebecca can't wait to start in Fourth Year at Trebizon with new dorms and a chance to play in an exciting hockey tournament. But with the arrival of Swedish exchange student, Ingrid, everyone starts falling out. Rebecca and Robbie included.
 
Can the friends recover from Ingrid's icy influence?