BACKGROUND: Biological changes underlying the sexual and reproductive maturation of school-age children are linked with various sexual and reproductive health and rights risks. SRHR risks are predictors of poor SRHR outcomes, such as poor knowledge of sexually transmitted diseases and early sexual initiation occurring predominantly among school-age children. The aim of this proposed review, therefore, is to identify educational interventions that have proven to be effective in promoting or supporting the sexual and reproductive health and rights of school-aged children in low- and middle-income countries. METHODS: A systematic review of studies on the strategies promoting the SRHR of school-aged children shall be conducted. Electronic searches will be conducted from January 2000 onwards on the following databases: MEDLINE(R) ALL (Ovid), Embase (Ovid), CINAHL (EBSCOHost), APA PsycInfo (Ovid), ERIC (Ovid), Cochrane Central Register of Controlled Trials (Ovid), Education Source (EBSCOHost), Web of Science (Clarivate Analytics), SciELO Citation Index (Clarivate Analytics), Global Health (Ovid), and Sociological Abstract (Proquest). Studies eligible for inclusion will be randomized control trials (RCTs), non-randomized trials, quasi-experimental studies (e.g., pre-post tests), and observational studies (cross-sectional and cohort studies). Peer-reviewed studies published in English and/or French and involving school-aged children 5-10 years old will be included. The primary outcomes of interest will include knowledge, awareness, or attitudes about SRHR topics. The secondary outcomes of interest will include sexual and reproductive behaviors. Two reviewers will independently screen all citations, abstract data, and full-text articles, and the methodological quality of each study will be appraised using JBI critical appraisal tools. A narrative synthesis of extracted data will be conducted. DISCUSSION: The systematic review will synthesize the evidence on existing educational interventions targeting SRHR outcomes of school-aged children in low- and middle-income countries. It will identify which interventions have proven to be effective, and which interventions have not proven to be effective in promoting or supporting their SRHR. Review findings will provide a useful reference for policy-makers, program developers, global health leaders, and decision makers who wish to support the SRHR of school-age children. SYSTEMATIC REVIEW REGISTRATION: The protocol has been registered at the International Prospective Register of Systematic Reviews (PROSPERO CRD42020173158).