Sam went to his English teacher for tutoring in hopes of improving his rhetoric.
I would recommend finding someone that has expertise in the subject you need tutoring in.
Tutoring is also available online through sites such as Tutor.com or Tutor-Homework.com.
His father Timothy Edwards (1669-1758), son of a prosperous merchant of Hartford, had graduated at Harvard, was minister at East Windsor, and eked out his salary by tutoring boys for college.
But though his natural defects of intellect and will-power were not improved by the pedantic tutoring to which he was submitted, he grew up pious, honest and well-meaning; and had fate cast him in any but the most stormy times of his country's history he might well have left the reputation of a model king.