I'm Mark, i'm 14 years old, i need 12 thousand dollars for a Student exchange program to the US, any ideas on how i can get that kind of money in a year?

No, you WANT $12,000 to go to the program You don't NEED to go. Unless you have rich relativve who is willing go spend that kind of money on this for you, just not going to happen.

Crowd funding?

Summer sales job maybe?

You DO NOT NEED $12,000. You want $12,000. I want $12,000 also.