I got 3 recommendation letter from 3 teachers. I got it from my algebra 2, Mandarin, and psychology teacher. I was really active in algebra 2 class so I think she wrote a good letter from me. The problem is some colleges maximum rec letter are only 2. So I cannot decide the 1 recommendation to send. Is it the Mandarin or psychology teacher. For the Mandarin teacher I took his class 3 years and I was just a study kid in his class. I asked him a rec letter and he finished in 1 day. However, for the psychology teacher, I was pretty active and funny in his class. I made the class kind of pumped up and he just smilies. For the Mandarin teacher, he is Chinese and he kind of lacks english but he is a cool teacher. I do not really know which 2 to send. For sure, one is algebra 2 teacher but I do not the other one. PLEASE HELP! 
I think you should go for the one that leans towards what u want to study. It shows colleges something.
Have you personally interacted with any of them?
Like ukegirl98 said, you should most probably go for the one that closely relates to your major.
If neither of them do, then I would go for the psychology one, if I was in your place.