OpenLearnWare (OLW) is the online platform of the TU Darmstadt that provides free access and exchange of learning materials. Lecturers at the TU Darmstadt can provide their teaching materials publicly on the OpenLearnWare platform. This can be for lecture notes, presentation sheets, scripts or audio files. It is recommended to use a CC BY SA licence. The platform itself is also open source. OpenLearnWare (OLW) has been active in OER since 2009. There are currently 3689 resources from 258 lecturers from TU Darmstadt.