stooge n.

late 14c., from Old French estudiant "student, scholar, one who is studying" (Modern French étudiant), noun use of present participle of estudiier, from Medieval Latin studiare "to study," from Latin studium (see study (v.)). An Old English word for it was leorningcild "student, disciple."

Student-teacher in reference to a teacher in training working in a classroom under the supervision of a head teacher is from 1851, American English (pupil-teacher in the same sense is by 1838).