In adult prisons and jails, can inmates over the age of 17 provide inmate peer education to youthful inmates (age 17 and under)?

Under certain defined parameters, yes.  In adult prisons and jails, youthful inmates are generally prohibited from having contact with inmates over the age of 17.  See 28 C.F.R. §115.14.  However, youthful inmates may have contact with inmates over the age of 17 outside of housing units if there is direct staff supervisionDirect staff supervision means that security staff are in the same room with, and within reasonable hearing distance of, the resident or inmate.  See 28 C.F.R. § 115.5.  Accordingly, the adult prison and jail standards do not prohibit inmate peer education by inmates over the age of 17 to younger inmates if the education occurs outside inmate housing units and there is direct staff supervision during the education process.

Inmate Education,
Youthful Inmates