The review aims to provide young student-athletes more opportunities to play.
Minister for Education for Schools, Ng Chee Meng said at the opening ceremony of the NSG that the review will take place over the next three years.
The NSG Junior Division competition is usually the first formal inter-school meet for primary school pupils aged nine to 11.
The review committees are led by the respective national conveners for each of the 21 sports competitions organised by the Singapore Primary Schools Sports Council.
A three-tier competition will also be implemented, where players will be grouped into teams with comparable skills after an initial classification competition. This will let all players, including substitute players, get more play time.
Mr Ng in a speech said: "The review of Junior Division competitions seeks to design competition experiences that are developmentally more appropriate for young children competing in a formal inter-school competition for the first time, by strengthening their fundamental skills and cultivating the joy of playing sports.”