The CELTA has a worldwide pass rate of over 95%, so failing the course is quite rare. We look carefully at application materials and conduct interviews with each candidate to ensure that they will do well on the course. If we don't think they have the ability to pass the course, we do not accept them. The low trainer to trainee ratio (1:6 maximum) also provides a supportive learning environment.
However, candidates may get sick or have other emergency situations that could negatively affect their performance on the course. In these situations, we recommend that students notify the tutors immediately and withdraw from the course to avoid being given a failing grade. They may retake the course at a later date if there is space available.