This study investigates the effect of communication skills training concerning aided-speaking students' questions in classroom interaction. Eighty-two Swedish teachers and classroom assistants working with students using augmentative and alternative communication (AAC) participated. The study was based on the Conversation Analytic Role-play Method (CARM) and implemented as a pre-post intervention design. The results show significant change on self-efficacy but not on interactional awareness. Level of education in combination with firsthand contact with students was significant. The correlation between self-efficacy and interactional awareness indicated interdependency. The study highlights how AAC topics can be included in teacher education and communication skills training for professionals.