This is a core text aimed at the mandatory CTLLS unit for Levels Three and Four which all trainees working towards ATLS need to successfully complete. Structured around the content of the unit, all chapters are linked to the QTLS professional standards. This Second Edition has been fully revised and updated in line with changes to the TAQA Assessor Awards and includes a new 'extension activity' for those taking the unit at Level Four. With helpful activities and case studies throughout, this is an accessible guide enabling trainees to understand how to use assessment effectively in their learning and teaching.