By Jeremy LydicCAMPBELL, Ohio – In a project for his technology class, Mihali Koullias was challenged with protecting an egg. The task was clear: build a car that protects the egg during a short trip down a diagonal track. Koullias, seventh grade, and his classmates designed and built each car to a specific length and width, then used computers and 3D printers to design and make the wheels. His team’s first egg cracked, he says, but they solved the issue by upgrading the car’s seat belt “to make it secure.”  Hands-on projects like this are the cornerstone of education at the Northeast Ohio Impact Academy, a STEM (science, technology, engineering and mathematics) school adjoined to Campbell Middle School.   Koullias, who aspires to be a cardiothoracic surgeon, says projects like this make him more confident with problem solving and working with his hands, and he’s eager for the forthcoming health pathway in the new Community Literacy, Workforce and Cultural Center, set to open May 1 next to the school. The idea for the Impact Academy came about around the same time Campbell City Schools was planning the Cultural Center, says Kent Polen, the academy’s chief administrative officer...