Translate the following sentence into English.
她明白教育将对山区孩子的一生起巨大作用，自愿去那里的一所小学教书。（choice; difference）
SHE WENT BY CHOICE TO TEACH IN A PRIMARY SCHOOL IN A MOUNTAINOUS AREA, AWARE THAT EDUCATION WOULD MAKE A GREAT DIFFERENCE TO THE LIFE OF THE CHILDREN THERE.
