xD Yeah when I had my 1st betta he lived for a year...in a 1 gal bowl. D': I was 14 and didn't know any better- but since this site- I've learned SOOO much more! ^^
O__O your teacher did what!? D:< That's terrible! I admit- my girls came from all different places and all at different times, but they get along fairly well. They have other fish to distract them and have loads of hidey holes :) Sororities take time and if they fail you have to be sure you have enough tanks (or return) the fish.
A lot of newer members also don't understand this D: