Ok. I am a fraternal twin. If it is a fraternal twin then you have both a blessing and a curse. They may not be identical but they can quite possibly look very similar. My brother and I have fooled many a person. In elementary we were similar enough to be a problem with identification but htat ended soon. In Junior High and High School we were very different. He was a LOT bigger and stronger than me and sibling rivalry kicked in and he kicked my ass constantly . It's bad enough with siblings in the same school at different ages but we were the same age, had similar friends, and due to school policy to have students in alphabetical order we were in some of the same classes right next to each other. His size advantage over me was a killer. I was an antagonistic little bastard just so i could rat on him out when beating me up. I seriously suggest different Jr. High schools or different High Schools if possible. Don't get me wrong, we are very good friends now. Back then we would have and did try (don't ask) to kill each other. It's not going to be easy. It might actually be the hardest thing you do. They have a bond that you cannot possibly understand. They will at the same time both love each other and hate each other. All you can do is guide them both along their path. I wish you luck.