More than 1,500 youngsters from 400 schools across Sheffield, Doncaster, Rotherham and Barnsley are taking part in the finals of the South Yorkshire School Games at the Horizon Community College in Barnsley.
Teams and individuals will be going head to head in sports such as cricket, golf, lacrosse, tag rugby and tennis.
Hundreds of medals will be up for grabs with pupils qualifying for the event after taking part in local inter-schools eliminators held at both primary and secondary schools.
There is also plenty of action for the less sporty types, with 100 volunteers takinig media role and others getting involved through cultural activities.
The games were first held in the build-up to the Olympics and were such a success it was decided to do a repeat this year.
Previous winter and summer events were held in Sheffield, twice at the English Institute of Sport at Attercliffe and at Abbeydale Park.
The Barnsley games are being held in partnership with Shaw Lane Sports Club.
Horizon Community College principal Nick Bowen said: “The games are a fantastic way for pupils to take part in competitive sport.
“The events will showcase their talents, but the day will also help them learn important values like teamwork.
“It is also fully inclusive, allowing young people the opportunity to be the best they can be.”
There will be a further stand-alone event taking place on Friday – an orienteering event at Wentworth Castle, Barnsley.