08
Jun
At low tide Friday morning along the muddy shoreline of Lead Mills, about 20 Tower School fourth-grade students watched intently as George Thatos explained how a stack of specially designed plates could help restore an entire marine ecosystem. Moments later, the lesson shifted from classroom theory to hands-on science. With his boots sinking deep into the muck of Salem Harbor, Thatos waded toward the water carrying one of his oyster reef restoration devices. A cluster of students trailed behind eagerly — a few venturing a…
