Between the years of 1912–1921, he taught several students who became excellent mathematicians, physicians and chemists, including Nobel prize-winning physicist Eugene Wigner (Jenő Wigner) and mathematician and polymath John von Neumann (János Neumann). At the age of 11, Eugene Wigner developed an interest in mathematical problems. From 1915 through 1919 Wigner studied at the Gimnázium, where he and Von Neumann were taught by Rátz. von Neumann entered the Gimnázium in 1911. Although his father insisted he attend school at the grade level appropriate to his age, he agreed to hire private tutors to give him advanced instruction in those areas in which he had displayed an aptitude.