전학이 · 전학을
transferring to another school (K–12)
Example
아버지 회사 때문에 서울로 전학을 갔어요.
I transferred to a school in Seoul because of my dad's job.
Word parts
전 move+학 learn
Literally 'moving schools'.
Good to know
Common patterns are 전학을 가다 (move away) and 전학을 오다 (arrive as a transfer).