Whatever Kevin Moninghoff was thinking as more than 100 alumni of Southern Regional’s music program delivered a rousing rendition of Henry Fillmore’s “Americans We,” only he knows. But as he sat in his seat along the center aisle inside the high school’s 9/10 gymnasium, not far behind Jennifer Hodgson as she conducted, the smile on his face said all that was needed.

“I was unbelievably touched by the outpouring of love from the whole music department and everybody who laid that foundation over…