YOU SAID:
the issue with school is long classes
INTO JAPANESE
学校の問題は長い授業です
BACK INTO ENGLISH
School problems are long lessons
INTO JAPANESE
学校の問題は長い教訓です
BACK INTO ENGLISH
School problems are a long lesson
INTO JAPANESE
学校の問題は長い教訓です
BACK INTO ENGLISH
School problems are a long lesson
You've done this before, haven't you.