“It’s amazing,” a Harvard-Westlake mother said, slowing down to gawk. “It’s stunning. Will it be here permanently?” With these words, 3D Art teacher John Luebtow’s glass sculpture received...

It’s 6:42 in the evening and 3D Art teacher John Luebtow is on his cellphone, anxious to begin working. “Where are ya?” Luebtow asks. One member of his four-man crew, which includes his son Matt...