The annual Linked Learning workshop series was established five years ago and has gathered a significant and constantly growing community since its first edition, proving the high relevance and timeliness of the workshop scope: use of Linked Data and entity-centric approaches in educational scenarios. The first edition (Linked Learning 2011 ) was held together with the 8th Extended Semantic Web Conference, ESWC2011 in Heraklion, Crete in May 2011, while the second edition was collocated with WWW2012 in Lyon and LILE2013 with WWW2013 in Rio de Janeiro. The LILE2014 workshop was organized at ISWC2014 in cooperation with LinkedUp, an FP7 Support Action that explored open and linked data for education and that is not only highly related to LILE but also emerged out of activities driven by the workshop chairs. LILE2015 returned to WWW2015, taking place in Florence, May 2015. All the five previous editions of LILE/Linked Learning featured an interactive mix of keynotes, paper sessions (10-13 accepted high-quality papers per workshop) and panel discussions and were among the best attended workshops of their respective conferences, bringing together key players in the field of Linked Data, Semantic Web, Knowledge-based Systems and education. All three previous workshops were very successful, outstandingly well attended and highly productive as well as engaging. The success and establishment of a growing “Linked Learning” community has been proven by several related follow-up activities that emerged out of the workshop series: outstanding papers from the workshop were selected to be published in specific post-proceedings (in addition to the general workshop proceedings ), and extended versions of some of the workshop papers were invited to submit to a special issue of Interactive Learning Environments, dedicated to the workshop theme which is guest-edited by the workshop chairs. The success of the events is also documented by its sponsors, including both EU-funded research initiatives and industrial companies such as Talis (UK) and GNOSS (Spain). In addition, the EU FP7 projects LinkedUp and AFEL and the W3C Community Group on Open Linked Education are affiliated with and inspired by the workshop series.