[VeritasKhan]

Context: A teacher is quizzing a student. What sorts of words or phrases might they use to show their approval of an answer?

Example #1
Teacher: Do you understand?
Student: I understand.
Teacher: Good. <-- (What might this be in Japanese?)

Example #2
Teacher: Please pronounce the word "wakarimasu"
Student: (says the word)
Teacher: Good. <-- (What might this be in Japanese?)

Specifically, I'm wondering if all or just a few of the below words would work or if any of them would not make sense for the situation.

よかった - yokatta
いい - ii
上出来 - jyou deki
良くやった　- yoku yatta
良くできました -　yoku dekimashita
良くやったね　- yoku yattane

Thanks so much!