Quenlig is a web application where users answer textually, generic to any kind of questionnaires, and designed as a formative assessment tool. Students can learn their courses, test their knowledge, exercise themselves and get ranked. It allows teachers to automatize examinations and practice lessons (giving context dependent advice when needed), dynamically monitor students progression and transparently verify if they cheat. The system returns statistics to improve the course quality and ensure a good knowledge acquisition. Examinations analysis show that its use in a low variance text based answer context improves knowledge acquisition.