Organised by ELIXIR, GOBLET, the Galaxy Training Network (GTN) and supported by de.NBI (RBC Freiburg), a hackathon was held for Galaxy training material re-use in Cambridge, UK from 22-24 May. The 3-day workshop was organised by Björn Grüning (DE/de.NBI/Freiburg), Gabriella Rustici (UK), Frederik Coppens (BE) and Celia van Gelder (NL), and it brought together people actively involved in Galaxy training from across the world - Belgium, Germany, France, Netherlands, Norway, Portugal, United Kingdom, Australia and United States.

The main objectives were to build on an existing collection of Galaxy training materials (https://github.com/galaxy-project/training-material), which was initiated at the 2016 Galaxy Community Conference. Materials had been created for several topics including Genome annotation, RNA-seq, ChIP-seq, Exome-sequencing, MethylC-seq and Galaxy Tool Development, with varying degrees of completeness.

During the hackathon the attendees discussed, brainstormed and worked on the materials, improving and adding slides, datasets, tools, workflows, metadata (Bioschemas and EDAM), Docker containers and interactive tours. Github was used to track tasks and issues, and the GTN Gitter channel was used as a chat room (https://gitter.im/Galaxy-Training-Network/Lobby). A new structure for the training material repository was also discussed and agreed on, and new topics were worked on, such as small RNA-seq, genome assembly and metabolomics. Much was achieved and the work will continue post hackathon and at the 2017 Galaxy Community Conference in Montpellier, France June 26-30 (https://gcc2017.sciencesconf.org).