The adaptivity provision in the web based e-learning systems nowadays is actual topic. Adaptivity organization can be done by grouping users into previously defined learner groups and by offering these group delegates the appropriate learning scenario. In this article a detailed description of group creation algorithm is presented. A learner group module is made based on the creation algorithm and implemented in Moodle system. It creates course learning groups and classifies learners into already existing groups. Group creation is done by using feature tree. Learner grouping helps to ensure fast system adaptive reaction according to learner characteristics and learning course features. The system offers each learner group their own course learning scenario appropriate to created groups. The created learner group module can be used both in the whole adaptive learning system knowledge area and in individual courses and course categories.