The FAIR-by-Design Methodology aims to promote the development of FAIR learning materials by incorporating the FAIR principles in the design process. Developed in a general, agnostic way, it can be applied to a wide set of organisations and environments using various tools and techniques for learning resource design. This text showcases a success story of adopting the FAIR-by-Design methodology to improve the development of learning materials that are part of the French online training platform DoRANum. It highlights the experiences, challenges and lessons learned and paves the way for others who want to incorporate the methodology in their instructional design.