OER are teaching and learning materials that are freely available for everyone to use whether you are a teacher, student or self- learner. Learning and teaching materials which are made available openly under licences which permit their free access, use, adaptation and sharing by others are transformed into OER. OER resources are licenced under Creative Commons (CC) licences and in particular the CC-BY (Attribution) and CC-BY-SA (Share Alike) licences are used.