Between birth and age 3, a child’s brain undergoes an impressive amount of change. The brain doubles in size in its first year, and by three, it reaches 80 percent of its adult volume. This period of a child’s life is the most important for brain development—and it’s inspired a new project from SIU Medicine’s Office of Population Science and Policy. Hillsboro Area Hospital serves as a community center, routinely hosts community events, houses a gym and has a day center within the confines of the hospital walls. Partnering with physicians, academics, early childhood workers, educators and