TY - Generic T1 - EduTags – How do Teachers share Resources using a Collaborative Tagging System? T2 - EARLI 2015 Y1 - 2015 A1 - Martin Rehm A1 - Tobias Hölterhof A1 - Michael Kerres KW - collaborative tagging system KW - edutags KW - Social Network Analysis KW - two-mode network JF - EARLI 2015 CY - Limassol, Cyprus ER -