I wonder what the outcomes were of all the various reformations the principle implemented in the school.
I wonder what happened as a result of all the changes the principle made one after the other at his school.
ご質問ありがとうございます。
① "I wonder what the outcomes were"＝「結果はどうなったのだろう」
"of all the various reformations the principle implemented in the school."＝「校長が学校で様々と行って改革の。」
② "I wonder what happened as a result of all the changes the principle made"＝「校長が次から次へと行った改革はどうなったのだろう」
"one after the other at his school."＝「彼の学校で次々にした。」
ご参考までに。
アメリカ合衆国 
