DDeveloped as part of the second edition of the massive open online course (MOOC) “Forests and Transparency under the Paris Agreement,” this webinar explored the processes and tools needed to build sustainable, multi-purpose national forest monitoring systems. Representatives from FAO for example, shared information from the FAO-developed Voluntary Guidelines on National Forest Monitoring. First-hand experiences designing and implementing NFMS were shared during the webinar, which included speakers from Mexico and Costa Rica. A variation of this webinar was also developed for the third edition of the MOOC. This webinar covered the same topics as the previous, with speakers and representatives varying slightly.