Release version 2.2.0 Major features: * Peer Instruction: A question can now be answered again in a second round. To limit the answering time, a countdown timer can be activated. * Full screen mode: The browser automatically enters full screen mode when presenting questions. Additionally, a theme optimized for projections is used in this case. The font size can be adjusted. * Learning analytics: Multiple calculation options for learning progress have been introduced. * Image answers (experimental): Free text answers can now be answered with an image (the feature has to be enabled explicitly for a question). * Performance: A lot of improvements have been introduced to make the UI more responsive Minor features and changes: * Simplified text formatting: A formatting tool bar has been introduced. * Video embedding from YouTube and Vimeo * Code syntax highlighting in questions * Hint & solution for questions * Session info: The previously with public pools introduced session info is now available for all sessions. * QR Code: It is now possible to generate and display QR Codes for a sessions directly from ARSnova Mobile. * Role switching: Switching between speaker to student views is now possible without leaving a session or logging out. * Embedded pages: External websites are now embedded in ARSnova (if possible) instead of opening a new browser tab. * Usability improvements and bug fixes Bugfixes: * Fixed a rendering bug with latest Chrome versions (43+) which made question answering impossible. This version is brought to you by: Project management: Klaus Quibeldey-Cirkel Lead programming: Andreas Gärtner, Daniel Gerhardt, Christoph Thelen Contributions: Simon Hauck, Marcel Hedderich, Dominik Hikade, Nicola Justus, Tom Käsler, Maximilian Klingelhöfer, Franciska Periša, Simeon "EinBaum" Perlov, Björn Pfarrreis, Sviatlana Plakhina, Dennis Schönhof, Katharina Staden, Max Steinwachs