Jisho gives "exam" as one of the possible meanings of 校, but I was not able to find any words with this kanji which has a meaning related to "exam". Is there any?
My interest in this comes from the fact that I have started using Helsig's method to memorize kanji, but it seems counterproductive to me that some keywords are not related to any meaning of the corresponding kanji. Therefore, I have decided to replace each of such keywords with one of the corresponding kanji meanings. There is a keyword "exam" for this kanji and I'm considering updating it to something which makes more sense, such as "school".
obs: I have looked in the list of words which use this Kanji in Jisho. If there is a better way to find words which use a kanji, I'd be glad to know