tutor
US /ˈtuː.t̬ɚ/
UK /ˈtuː.t̬ɚ/

1.
a private teacher, typically one who teaches a single student or a very small group
:
•
My math tutor helped me improve my grades significantly.
•
She works as a private tutor for high school students.
a private teacher, typically one who teaches a single student or a very small group