This paper deals with a numerical solution enabling universities to extend the functionality of their distance learning platform to improve not only their model of delivery of educational content but also their evaluation of learners' knowledge. Indeed, this paper proposes a solution for e-learning platform Moodle, to create virtual classrooms, integrating video, audio, chat, audio recording of different actors. This solution integrates an audio knowledge assessment tool for language courses and allows learners to learn to write or do online assignments requiring extensive use of symbols and mathematical tools. Our solution which is built around the WebRTC technology, is used directly with popular browsers without installing plugins as well as from computers as from smartphones and tablets. Our solution has been tested by the Virtual University of Senegal actors and allowed teachers of language and mathematics to assess students online as it should be without necessarily making use of multiple choice or having to modify the tests to take in charge the difficulties associated with the use of platforms for online assessments.