hi !!
Albert Einstein hated school ....When he was 15,his Greek teacher told him he'd better quit school. Einstein said he didn't do anything wrong and his teacher told him "you alter the respect for the class towards me by your only presence".
So he left school, joined his parents in Pavie (Italy) and decided to quit the German citizenship in 1895. It was official in 1896. He applied at 16 years old to the Swiss Federal Polytechnic in Zurich . He failed his exam but was recommended by the principal of Polytechnic to a swiss school, the Argovian cantonal school in Aarau because he had obtained exceptionnal grades in physics and mathematics.
Hope this will help :)