YOU SAID:

whose here because they dont have the mental compacity to focus on anything school related

INTO JAPANESE

彼らは学校に関連するものに集中するための精神的な能力を持っていないので、ここにいます

BACK INTO ENGLISH

They are here because they do not have the mental ability to focus on things related to school

INTO JAPANESE

彼らは学校に関連することに集中する精神的な能力を持っていないのでここにいます

BACK INTO ENGLISH

They are here because they do not have the mental ability to focus on things related to school