FORT WORTH, Texas — The hallways of Harmony Science Academy are filled with boxes as teachers pack up for summer, but for Luiz Mullini Nascimento those boxes won’t be unpacked for next year’s students.
“Can you believe there was a band in this room here?” he says in a packed-up room on his last day, May 27.
Mr. “Mullini,” as everyone calls him, is retiring after 20 years of perfect attendance…