18 YEARS OF DEVELOPMENT AND USE OF THE SWAD EDUCATIONAL PLATFORM Antonio Cañas1,2, Daniel J. Calandria2, Juan M. Boyero2, Eva M. Ortigosa1,2, Javier Fernández1,2, Francisco A. Ocaña3 1Department of Computer Architecture and Technology, University of Granada (SPAIN), 2OpenSWAD Association (SPAIN) 3Department of Statistics and Operations Research, University of Granada (SPAIN) SWAD is a free-software educational web platform to support face-to-face or blended learning, including course information, syllabus, calendar, documents, shared files, portfolio, grades, assignments, projects, quizzes, surveys, games, exam announcements, groups, lists of students and teachers, attendance control using QR codes, social network, forums, notifications, notices, messaging system, statistics, agenda and preferences. Some of these features are also available as an m-learning app for Android: SWADroid. SWAD has been developed from scratch and used at the University of Granada, UGR (SPAIN) since 1999. It was released as free software in 2010. Since 2012 it is also available free of charge in the OpenSWAD.org portal without the need for local installation.

swad.ugr.es

January 2005 - November 2017 � 437.1 million clicks (page views) � 352 � 23 � 61 � 0.8 million million million million (81%) (5%) (14%) (<1%) students teachers others admins Page views and unique users per week in SWAD-  UGR from 2005 to 2017 In 2015, the UGR decided to bet on another 177,570 platform as the only official. This is the cause of users have logged in the decline of SWAD-UGR in the last two years.     158,367 3,664 24,572 129 (89%) (2%) (14%) (<1%) students teachers guests admins Location of SWAD in the set of teaching platforms �1.9 million �20.4 million at the UGR from 1999 to 2017 sent messages received messages at the UGR from 1999 to 2017 November 2017  131,866 current users     Number of teachers and students who logged in 120,509 3,408 8,364 115 SWAD-UGR from 2005 to 2017 (91%) (3%) (6%) (<1%) students teachers guests admins from 848 institutions  � ❓ 100,025 8,550 23,291 (76%) (6%) (18%) Number of lines of code of the main module of from UGR from other institutions unknown SWAD, swad-core, from 1999 to 2017 � 450  7,255 SWAD is free software since 2010 degrees courses swad-core SWADroid � 682,501 (1.2 TB) Affero GPL v3 license GPL v3 license files https://github.com/acanas/swad-core https://github.com/Amab/SWADroid � 33,221 � 18 million 234,352 117 38,673 17,790 test questions times answered Number of degrees, courses, teachers and lines of C code MySQL tables lines of code downloads � 1,316 � 61,186 students in SWAD-UGR from 2004 to 2017

62 person-years 9 person-years forums forum posts estimated effort* estimated effort* SWAD is still used in the UGR, although to a lesser extent. $3,393,256 $493,448 Now our goal is OpenSWAD.org. estimated cost* estimated cost* Other modules and more info: https://openswad.org/source

* According to COCOMO model in Open Hub