TY - CPAPER SN - 978-1-5108-1431-8 AU - Derr, Katja AU - Hübl, Reinhold AU - Ahmed, Mohammed Zaki T1 - Using Test Data for Successive Refinement of an Online Pre-Course in Mathematics T2 - Proceedings of the 14th European Conference on e-Learning ED - Jefferies, Amanda ED - Cubric, Marija PY - 2015 CY - Red Hook, NY PB - Curran Associates, Inc. PB - Academic Conferences and Publishing International Ltd UR - http://www.zemath.dhbw-mannheim.de/fileadmin/ms-sonst/zemath/derr_ecel_2015.pdf SP - 173 EP - 180 TS - EndNote Tagged Import Format C7 - 14th European Conference on e-Learning (ECEL 2015) C1 - Hatfield, United Kingdom C4 - 29 – 30 October 2015 M4 - Citavi ER -