LAS VEGAS -- On this first day of school, the Clark County School District is experiencing some growing pains.
CCSD projects it will serve an estimated 320,000 students this school year, breaking last year's record enrollment of more than 315,000 students.
The hardest hit campuses are elementary schools, which are almost 18 percent over-capacity on average.
Campuses are getting crowded and everyone from administrators to parents to kids is learning lessons on escalating enrollment.
It is the first day of school at Ries Elementary School, which is serving the booming southwest valley.
Brenna Monaghan has been coming here since kindergarten. On Monday, she began fifth grade.
"I actually know a lot of my friends here still, so that's good," Brenna said.
But Brenna's final year will be different because Ries Elementary is now a year-round school.