How long is the In-Class Training? October 07, 2021 01:11 Updated We generally recommend setting aside about 4 hours to Facilitate the course in a classroom setting. Related articles Can I just do the Final Test? How long is the Smart Serve training course? Do I need to take all of the training to update for Retail Sales? Can I still do the training if I don't have a web camera? Do I have to complete the online training all at once?