Almost 300 school students took part in round robin games of league-tag at George Griffin Oval and the Bega Recreation Ground on Thursday with seven separate schools represented in three age groups.

Students from Bega High, Eden Marine High, Lumen Christi Catholic College, Cooma-Monaro, Bombala High, Narooma High and the Sapphire Coast Anglican College took part.

It is the biggest league-tag day of the year and a favourite for organisers.

"Everyone just gets in and plays and the games are all in great spirits," said NRL development officer Damian Kennedy.

Bega High are one of the biggest supporters with a contingent of about 80 girls this year.

"Our numbers have been in the 70s to 90s each year, it's been awesome," said Carly Bexterman.

"We typically have three or four teams in each age group.

"There are 80 here today and they've been to roll call this morning then walked down under our supervision and they play league-tag all day."

Lumen Christi were also one of the strongest representations with 52 students taking part across three squads.

Teachers praised the conditions and said all the students were thrilled to be out in the sunshine, meeting new friends and enjoying the activity.

"They're really hyper for it," Ms Blexterman said. "They're full of beans, smiling and happy."

Ms Blexterman said the benefits were also twofold with additional opportunities for the girls to get into the sport, but a gold coin donation also helped local charities.

"It started as a charity shield to support breast cancer research and the girls are still giving donations today, which is awesome," she said.

"And even if it doesn't lead to more girls signing up for weekend sport it provides them opportunities to play they wouldn't normally get at school."

Mr Kennedy said league-tag had become the quickest growing area of rugby league and tournaments like the Kezie Apps Shield were critical to the development of the code.

He said it was enormous day for Group 16 and was delighted to see all the students enjoying a few games of footy.

The Shield is named for Kezie Apps, who began playing league-tag and is now recognised as potentially Australia's best female rugby league player. Unfortunately Apps couldn't attend on Thursday due to commitments with NRLW for the State of Origin promotions.