45 C.F.R. § 235.65
Activities and costs not matchable as training expenditures
FFP is not available for the following expenditures as training costs; however, the expenditures described in this section may be matched as administrative costs, if conditions for such matching are met:
(a) Salaries of supervisors (day-to-day supervision of staff is not a training activity); and
(b) Employment of students on a temporary basis, such as in the summertime.