One member presents a real, current work challenge. Crucially, they are not allowed to present a solution. They describe facts, stakeholders, and constraints. This is called "naked problem presentation" in H Hayat terminology.
If your team suffers from:
Apply newly learned skills immediately to your work. The "Circle" is completed when the training results in a measurable improvement in job performance, which then highlights the next set of higher-level skills needed. H Hayat Trainingcircle Work [upd]