Наступного року отримав свідоцтво,

Наступного року отримав свідоцтво, яке давало йому право викладати у вищій гімназії до 10 класу

Результаты (английский) 1:

The next year he received the certificate, which gave him the right to teach in a high school gymnasium to 10 class

Результаты (английский) 2:

The following year received a certificate, which gave him the right to teach in high school to Grade 10

Результаты (английский) 3:

Next year received a certificate, which itself gave him the right to teaching in higher school till the 10 class