@conference {3719, title = {$\#$WhatsTheDifference? Comparing Hashtag Conversation on Twitter among Teachers}, booktitle = {Association for Educational Communications and Technology (AECT)}, year = {2014}, address = {Jacksonville, USA}, keywords = {Network of Practice, Social Network Analysis, Teacher Education, Twitter}, author = {Martin Rehm and Preussler, Annabell and Michael Kerres and Katerina Bohle-Carbonell and Ad Notten} }