Scott Miller has taught at the A.W. Beattie Career Center in McCandless for so long, he is working on his second generation of students.
Miller, a heating, ventilating and air conditioning instructor, said the fathers of two incoming students are former students of his.
Miller, 57, of Prospect, Butler County, began teaching at the center in 1984.
He grew up in Hampton and is a 1979 graduate of the center, which offers programs to students in grades 10-12 who reside in nine northern Allegheny County school districts.
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