To tell the truth, these things are just a formality. Since it can be stamped, it means it is entirely possible. The school will not specifically check your stamp, as long as you have a stamp.

Another is that if you teach them in a training class during your internship, there is no problem at all.

Of course, the details still depend on what the school says, because each school is different, so the requirements of the internship period will be different. If your training course is signed with the school, then there is no problem at all. If it is not a training course signed by the school, it depends on what the school says.