The Namibian College of Open Learning (NAMCOL) is a government-funded educational institution that provides study opportunities to adults and out-of-school youth. NAMCOL has adopted the Notesmaster platform as a learning portal for its secondary education programme. This study aims to share the NAMCOL experience, in using Notesmaster as a preferred platform for OER in open schooling, including experiences of the content developers, tutors and learners. Data was gathered from learners, tutors and content developers to assess their involvement and determine to what extent the platform has contributed to their success in teaching and learning. In documenting and sharing the successes and challenges experienced by NAMCOL, this paper could serve as a valuable resource to any Open Innovative School seeking to implement its own OER development programme and subsequent provision to learners and tutors.