Originally Posted by Val
... using my son as a tutor...
Some may say this is OK only if presented to the student as one of several non-punitive options, and the student is given free choice without pressure, coercion, or negative consequence.

While some tout the benefits to the peer tutors such as honing leadership and presentation skills as well as the opportunity to firm up academic skills by teaching... others have compared compulsory peer tutoring to slavery: forced servitude to perform the labor which others reap benefits from and/or are compensated (paid) for.

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"always been taught to use my best students," and that this policy was common among teachers.
USE may be the operative word here. Bold, brazen, disgusting. Morally and ethically bankrupt.

(stepping down from soapbox)