Failure - a word that is taboo in education and yet is part and parcel of the learning experience. As teachers, dealing with errors in the classroom can fundamentally change so much of the learning experience. The beliefs teachers and students hold about failure and errors changes behaviour and can cause students to persist and grow or to avoid risk and challenge. This term Psychology in the Classroom will be exploring Failure with the help of researchers and the British Journal of Educational Psychology(BJEP). This first episode introduces several key concepts with the editors of the BJEP Special Issue on failure: Gabriele Steuer, Elizabeth Peterson and Maria Tulis