Investigating Different Educational Blog Characteristics to Support Collaborative Learning based on Connectivism Learning Theory Topics: Active Learning; Constructivism and Social Constructivism ; eLearning Case Studies; e-Learning Platforms, Portals; Learning Analytics; Synchronous and Asynchronous Learning; Tools for Educational Communication and Collaboration; Universal Design for Learning In Proceedings of the 12th International Conference on Computer Supported Education - Volume 2: CSEDU, 118-129, 2020