Could you please check the following sentences, please? Thank you.

Question

1)I'm still waiting to receive an answer from the principal of the German school to see if they are willing to accept your school in our Comenius partership.
2) In any case, our science teachers are really interested in developing European projects with your school in the near future.
3) So, why don't we start with an e-mail partnership among our students which could eventually lead to a school exchange (programme)?
4) My students from the eleventh class (about 17 years old) are enthusiastic about the idea of corresponding with Finnish students in English.
5) Do you think you could involve some of your students from the international branch?

Answer 1

3. omit comma

All else is fine.