Is there something like codewars with pascal?

Question

MySQL

Son for practice for the Olympics.

Answer 1

Then make a separate table with individuals and refer to it from both students and teachers (if they can be both). Well, then connect users with individuals (if there is one login for both the teacher and the student)

Answer 2

Decide whether you have a role or a separate table.
Usually Персона> Роль+Пользователь

Answer 3

There is something https://acmp.ru/index.asp?main=tasks