E-learning emphasizes collaborative learning through the use of Web 2.0. The tools of Web 2.0 advocate open collaboration, interactive technology, and personalized learning that promotes expanding the scope of teacher/student/course interaction, as well as advancing the social construction of knowledge, an important component of socio-cultural theory. Using writing as inquiry, we investigated the usefulness of using Tumblr (a microblog) as a teaching tool for three cohorts of students across two countries. The multimedia format of Tumblr enhanced student interaction with the material and with each other, while increasing the digital competencies of our students and ourselves. Tumblr also allowed for a personalization of the self-guided learning, and fostered a dynamic online learning community.