YOU SAID:
how was school today?
INTO JAPANESE
学校はどうだった?
BACK INTO ENGLISH
How was school?
INTO JAPANESE
お帰りなさい 学校はどうだった?
BACK INTO ENGLISH
Welcome back, how was school?
INTO JAPANESE
おかえりなさい、学校はどうでしたか?
BACK INTO ENGLISH
Welcome back, how was the school?
INTO JAPANESE
おかえりなさい、学校はどうでしたか?
BACK INTO ENGLISH
Welcome back, how was the school?
That didn't even make that much sense in English.