YOU SAID:

My ninja you better get back to paying attention in class

INTO JAPANESE

私の忍者をよりよく戻るクラスの注意を払って

BACK INTO ENGLISH

Paying attention in return better than my Ninja class

INTO JAPANESE

お返しに私の忍者のクラスより注意を払ってください。

BACK INTO ENGLISH

In return, pay attention to my Ninja class.

INTO JAPANESE

その見返りに、私の忍者のクラスに注意を払います。

BACK INTO ENGLISH

In return, pay attention to my Ninja class.