If you're looking for a past tense verb related to tutoring, you could use:
* Tutored: This is the past tense of the verb "to tutor."
* Taught: This is a more general verb that can also be used to describe tutoring.
For example:
* Present tense: "I tutor students in math."
* Past tense: "I tutored students in math last year." or "I taught math to students last year."