転校した

transferred to another school

→ 転校
phrase Rare #39,469
transferred to another school The past form of 転校する, meaning to change or transfer schools. The plain form can be used in casual conversation or neutral statements; the polite form is 転校しました.
JA: 高校二年生のときに転校した。
EN: I transferred to another school when I was in my second year of high school.

彼は昨年転校した

He transferred to another school last year.

転校したそうですね

I hear you transferred to another school.

タナー医学部転校した

Tanner transferred to medical school.

— セッション (2014)

なぜ死んだお前が転校しただから

Why? Because it was after you transferred schools and died.

— オールド・ボーイ (2003)