Towards a Tailored Hybrid Recommendation-based System for Computerized Adaptive Testing through Clustering and IRT Topics: Authoring Tools for Intelligent Tutoring Systems; eLearning Case Studies; e-Learning Platforms, Portals; Intelligent Tutoring Systems; Machine Learning; Mentoring and Tutoring; Metrics and Performance Measurement; Tools to Assess Learning In Proceedings of the 12th International Conference on Computer Supported Education - Volume 1: CSEDU, 260-268, 2020