The community platform Young/Teen English Language Learners (YELL/TELL) was developed to respond to the needs of collaboration and sharing among trainee teachers, school teachers, teacher trainers and researchers in the field of language learning for English FL/SL. The current study focuses on ethnographic observation and data gathered during a workshop for professional development organized for experienced teachers. We compare the evidence of the teachers’ actions, with the analysis of their perception about the professional use of the online environment and their critical reflection about the experience.