Abstract This case study examines the use and possibilities of blogging as reflective practice journals by student teachers during their practicum. The blog serves as a tool for the construction of their teacher identity through the encouragement of daily reflection on school experiences. The study investigates how the blog, as a digital tool, facilitates peer interaction, reflective thinking, and collaborative knowledge construction. Conducted with participants from primary and secondary education programs at the University of Valencia the research employs a qualitative, instrumental case study methodology. The researcher acted as the teacher-tutor of the internships and students shared their impressions by sharing their experiences within the group. Findings suggest that blogs function as effective platforms for fostering reflective writing, enhancing peer support, and promoting collaborative knowledge construction, ultimately contributing to the development of professional identity among student teachers. Self-censorship is identified as the main limitation, especially when sharing perceived shortcomings in the school system and teaching practice. The study concludes that the blog provides an interactive space that enriches personal writing expression and collaborative learning, highlighting also their value in teacher education.