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! 
Personally, I’d send the psychology teacher’s letter.
Your Mandarin teacher might be cool and all, but you should think about which one could write a better letter; Not only will your psych teacher write better, s/he may also be able to write about the kind of impact you had on the class and students around you. If you truly made the class a better environment, s/he could testify to your personality and make you more unique in the admissions process.
Agreed.