IDEO method cards (2003) popularised this type of cards as a part of spreading design thinking. The card decks are often used for planning workshops and discussing what methods and exercises to use in for example hackathons, brainstorming sessions and meetings.
Method cards help you create timelines and sequences that let you understand how to plan and design workshops.
MethodKit on Workshops is one example of how method cards could look like. It also contains elements like tech check, break and lunch to be able to create a schedule for the workshop.