Showing Approval of Someone's Answer to a Question

[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!

[RadioKid]

よろしい：YOROSII;Good! would be Good!

よかった - yokatta => not good or not used in Japan in those cases.
いい - ii => 　いいね：IINE would be better.
上出来 - jyou deki => not make sense and not used
良くやった　- yoku yatta => used only in some cases when studet achive something.
良くできました -　yoku dekimashita => good for small children.
良くやったね　- yoku yattane => not used in school

I assume the teacher is Japanese. If the teacher is foreigner, "OK" would work well.

[VeritasKhan]

Thanks RadioKid!