Module 3 builds upon Mondule 1's background coverage by first providing more in-depth discussion on intermittent resources, grid operations and ensuring grid reliability. Module 3 then covers how to model emerging variable energy resources, such as solar and wind, in grid operational tools. The module demonstrates how existing modeling and operational practices are insufficient to properly manage and leverage clean, renewable resources, which have different characteristics than conventional fossil-fuel generators. While conventional generators are seen as being fully-dispatchable. Advances in stochastic modeling and operations are necessary to fully leverage these variable resources. The module then dives into various methods connected to decision making under uncertainty and how such advanced methods can improve utilization of renewable resources, reduce overall operational costs, all while maintaining reliability.