Introduction: Accidents involving sports or leisure activities, falls, blows from objects, acts of interpersonal violence, and accidents can all result in dental trauma (also known as traumatic dental injuries [TDIs]). School children are one of the population groups that are highly vulnerable to TDIs. Multiple school-based interventions have been conducted around the world on the prevention and management of TDIs; however, no known scoping review has been conducted to map the evidence. Hence, this study aimed to conduct a scoping review of existing school-based interventions on TDIs. Methods: This scoping review adopted the research design presented by Arksey and O’Malley. Eight research databases—PubMed, SCOPUS, APA PsycINFO, CINAHL Ultimate, AMED (The Allied and Complementary Medicine Database), Child Development & Adolescent Studies, Psychology and Behavioral Sciences Collection, and SPORTDiscuss—were searched to retrieve literature relevant to the scoping review question. Some of the retrieved literature existed in duplicate and was deduplicated using Rayyan software. Twenty papers that fulfilled the inclusion criteria were selected and reviewed. Results: A total of 526 publications were retrieved from the eight databases searched in this scoping review. Ninety-seven publications were duplicates and were removed. After the two-stage screening of the deduplicated copies, only 20 peer-reviewed journal articles were relevant and included in the review. The selected studies sampled a total of 7152 participants whose ages ranged between 9 and 62 years (mean = 10.56 to 46.5; standard deviation = ±0.97 to ±8.1). The findings obtained from the reviewed journal articles revealed that pupils are at high risk of dental trauma and they are more likely to sustain these injuries during school activities. In addition, inadequate understanding, poor attitudes, and low experiential knowledge of dental trauma were found among educators, parents, and even school pupils. The evidence of long-term knowledge retention and a high knowledge score in the experimental groups buttresses the need for continuous first-aid education on dental trauma. Conclusions: The application of multiple educational approaches or modalities in schools will reinforce and promote good first-aid skills and management practices that are essential for preserving traumatized teeth.