In the next five years, Central Valley School District needs a third high school capable of holding 1,800 students, plus new elementary and middle schools, a draft capital facilities plan says. The plan, unveiled Monday, prioritizes construction projects needed to address the growing population of Spokane County's second-largest school system, and also provides a glimpse of how full some of the district's schools are already. "It's not complete; it's still just a draft," said Melanie Rose, district spokeswoman. "I expect there are going to be changes."