The hallways of Tuscarora High School were crowded and noisy by 7 a.m. Wednesday morning. Outside, administrators directed traffic and spoke urgently into walkie-talkies while students laughed and mingled on their way into the building. The same scene played out at more than 60 schools around the county on Wednesday, the first day of the academic year for Frederick County Public Schools. From Catoctin to Brunswick and from Middletown to Walkersville, summer break officially ended for more than 46,000 children.