This study proposed the multi-user G-Math PeerTutoring System for facilitating students' tutoring strategies in math learning in the remedial instruction. The G-Math Peer-Tutoring System included the mathematics learning activity management system for teachers and the peer-tutoring system for students. The main objective of the investigation was to explore the effects of the G-Math for children with mathematics learning difficulties. Our findings indicated that students benefited from the G-Math peer-tutoring in the remedial instruction. This study suggested the G-Math Peer-Tutoring system be an excellent peer-tutoring tool that enhances children's mathematics learning. Recommendations for future study were also provided in this study.