I forgot the last two sentences.
They are urgent!!
1)Can you write your name and e-mail on this sheet of paper so that we can get in touch with you (each other?) when you are back in America?
2) I would be pleased if our students could start sending e-mails to one another so as to improve their knowledge of English. (I don't know how to express it)
1) Please write your name and e-mail address on this sheet of paper so that we can get in touch with you when you are back in America?
2) I would be pleased if our students could start sending e-mails to one another in order to improve their English skills.