There has been a growing interest in the use of Open Educational Resources (OER) to support educators to adapt, use, re-use, remix and recontextualise content for teaching and learning. The purpose of this study was to investigate the extent and intent of adoption of OER practices and tools in secondary schools in Mauritius within a sustainable and innovative teaching and learning model. The main objective was to investigate whether the inclusion of OER in teaching could help maintain quality instruction and sustain a viable economic model for learners. Moreover, this study assessed the readiness and attitudes of secondary educators in their intention to adopt OER. A survey was carried out among 271 secondary school educators to determine the influential factors in the intention to adopt OER in teaching. Factor and regression analysis were carried out to estimate the significance of each independent variable. The findings of this study reported that Productivity, Interactivity, Infrastructure and Constraining Factors were among the factors that had a significant effect on teachers' adoption of OER in their teaching process. Combined with other findings as reported in the literature, this study also helps to enlighten policymakers about teachers' intention in adopting OER in secondary schools in Mauritius and how they add value to the teaching and learning processes. The Cabinet of Ministers in Mauritius approved the National policy on OER in December 2022.