I've been sitting in on planning meetings with schools and in an effort to focus planning on Big Ideas, key concepts and competencies we created a document that sets out the stages of an inquiry. Obviously it will be different from school to school depending on the language you use to describe inquiry, but in practical terms it defines the teaching that generally occurs at each stage. It also states the level of teacher / student control. For example, during the focus / knowledge attack stage teaching is more traditional and teacher led.
Inquiry Planning Template