This case study seeks to highlight the importance of implementation fidelity and how it was achieved in a programme evaluation study. This study was focused on the development, implementation and evaluation of an alcohol media literacy programme for Australian children. In a nutshell, the programme aimed to teach children to critically analyse alcohol advertisements in order to delay initiation to drinking. Implementation fidelity was achieved through the development of a detailed programme, delivery of the lessons by the same teacher across classes and the development, utilisation and analysis of non-participant observations and a researcher reflective journal. Challenges in achieving consistent programme delivery included the inevitable differences in students' learning needs and school logistics. Strategies for overcoming these challenges included ensuring knowledge of the students' learning needs prior to implementing the programme, ensuring open lines of communication with the classroom teachers and keeping detailed records of any variances in programme delivery. [This content is provided in the format of an e-book.]