ARDMORE, Okla. (KTEN) — Classes are officially back in session for Ardmore City Schools as of Wednesday morning.

This year, the district is making some changes, including the transition from multiple elementary schools to grade centers.

"There are so many changes this year, but our teachers will be welcoming our kids, and so glad they are here and ready to get the year started," said Superintendent Jill Day.

Students will be adapting to new bus routes and start times this school year.

"Sometimes you have tears with the little ones for just a few minutes, but parents need to know: Usually, when they pull off, the kids are fine," Day assured. "They are playing, having a great time, and getting settled in and ready to learn."

ACS teachers will participate in projects with professional learning communities,  where educators work together to improve students' learning opportunities across the board.

"PLC teams and our teachers have really bought in and are excited about it," Day said. "I think we will see all kinds of growth from that."

High school seniors met on the practice field early Wednesday morning to celebrate their last first day.

"We did Senior Sunrise this morning, where we all went to the practice field and watched the sunrise," said senior Kara Dery. "It was really sweet; we got a big group picture."

Some students are excited to see what's in store for their last year at Ardmore High

"It's so surreal we are graduating," said senior Sutoria Carter. "I'm a little nervous. It's my last first day, but I'm ready to get it over with a little bit."