YOU SAID:

I dont really like going to school because its so hard getting a high grade

INTO JAPANESE

高い成績を取るのはとても難しいので、学校に行くのはあまり好きではありません

BACK INTO ENGLISH

I don't really like going to school because it's very difficult to get good grades.

INTO JAPANESE

良い成績を取るのがとても難しいので、学校に行くのはあまり好きではありません。

BACK INTO ENGLISH

I don't really like going to school because it's very difficult to get good grades.