The focus of the TEIS webinar was on pre- and in-service teacher reflections on critical incidents that shaped their language learning experiences and their identities as EFL teachers. The discussions highlighted the unique Costa Rican “Colegios Nocturnos” system, a regular high school system that takes place at night. Speakers & discussants included Roy Gamboa Mena (Chair, Dept of Philosophy, Arts & Letters, UCR, Sede de Occidente); Hania Morales (EFL teacher, Naranjo & UCR, Sede de Occidente); & Natalia Ramirez Casalvolone (EFL teacher, Naranjo, UCR Sede de Occidente & IU Doctoral Student). Faridah Pawan (TEIS Chair) & Natalia Ramirez Casalvolone moderated.