A silver shovel broke ground Tuesday morning on Crane Country Day School’s estimated $4.5 million, 6,100-square-foot expansion (pictured above). The project — the biggest construction endeavor in the school’s 88-year history — includes administrative offices, English and math classrooms, an amphitheater, and an engineering and design center where newly hired instructors will collaborate with Dos Pueblos High School’s famed engineering academy. By partnering with Dos Pueblos, the K-8 private school will further deepen an educational style that’s long been hands-on and inventive, said Joel Weiss, Crane’s head of school. The new space is slated to open next fall.