This paper describes a graduate-level class to introduce a concrete framework for system-level low-power design. This class is not a university class, but one of special programs of IT-SoC Promotion Group with the support of Korea IT Industry Promotion Agency established by Korean Ministry of Information and Communication. It is open to EE, CS and CSE graduate students from various universities, who participate IT-SoC Academy. We organize a two-week program offered during winter vacation, consisting of 20-hour lectures and 40-hour experiments. The class is experiment oriented, and the students build their own power simulators for low-power embedded systems based on theories and concepts introduced in the class.