I am not a teacher
I am not a teacher, but i am using Duolingo to teach english to my sister. May i use the teachers functions to see if she is doing the lessons all day?
If your sister agrees, yes.
However, there is a much easier and more reliable way to check anyone's progress.
Our personal statistics in third party website Duome:
You will find explanations and background information in the links on the bottom of the webpage.
The most important are:
"Yes, if your parents agree" is the right answer here.
Students have to accept the teacher's invitation to join the teacher's classroom
Students can leave a classroom at any time
It might also be a difference in culture and country.
I am Dutch.
My parents would never agree on officially checking my sister's homework in a Duolingo classroom, if she does not want to agree.
It's one of the advantages of Duolingo's discussion forums to meet people of different cultures. And I am glad that you remind me of the fact, that in most cultures parents will make that decision instead of the child.