In unusual circumstances a student may have received formal training, typically from an institution similar to the University of Waterloo, in material that they would normally be required to take as a course in their plan. In such cases, they may show evidence as to why they should be excused from taking the course. If the evidence is acceptable to the student's department, the student may be permitted to demonstrate competence in the material in a manner acceptable to the department offering the course. This process is known as "Challenge for Credit." A challenge for credit cannot be used to recover from a failed course. Additional information may be obtained from the student's department. Where a Challenge for Credit is successful, the student is still expected to carry a full course load for the corresponding term; Challenge for Credit cannot be used to reduce the course load from the normal course load for any term. Challenge for Credit is available only for courses taught by the Faculty of Engineering.