YOU SAID:

i knew an answer in class today

INTO JAPANESE

今日は授業で答えを知っていました

BACK INTO ENGLISH

I knew the answer in class today

INTO JAPANESE

今日の授業で答えを知った

BACK INTO ENGLISH

I learned the answer in today's class

INTO JAPANESE

今日の授業で答えを学びました

BACK INTO ENGLISH

I learned the answer in today's class