BPMN (Business Process Modeling Notation) is the main BPM standard. It is supported by all major BPMS and modeling tools vendors; theoretical and practical knowledge of BPMN is a must for any BPM professional.
I provide BPMN training course that includes three one-day sessions: 1) BPMN Notation, 2) BPMN Practice, 3) Executable BPMN. All details at bpmntraining.ru (sorry, available in Russian only).
The value of the training is that it goes far beyond the formal notation and rules: students learn how to apply BPMN to business process from their own practice, they acquire knowledge of key process patterns, get the idea of process architecture and the relationship between processes and business objectives.