Common App online or via mail too? Teacher Recs and Snail Mail?

Hey, does anyone know if I can send in my teacher rec by mail and send in commonapp online or do I have to send in my commonapp via mail too?

yes it is up to your teachers how they want to send rec. letters. Ideally your teacher should send rec. by her/himself, however if it is not possible then you should put rec into envelope, then seal it by school seal or something like that. In short colleges should be sure that those rec. from your teacher.

It is your teachers decision on how they want to send it

one of my teachers sent it by himself, one did online, and two gave me to mail out (sealed by them)
so it depends on the teacher