Hey. I'm a 2nd year at liverpool and we are very very very pbl orientated in first year. you have textbooks to guide you through it (martini, tortora... your anat and physiol ones) and basically read the chapter that you're going to be working on, and if after you've done the 2 week module you haven't covered as much as in there, then you know you haven't done enough. Also, look around you, is the person sitting next to you miles in front of you? okay, maybe its a one off, but generally you want to be comfy in your knowledge.The facilitator is there as a guiding hand... if you aren't working enough, not saying anything or conversely not letting anyone else say anything then they get involved. they may not be in the health sciences field so are not there to teach you. They also are a bit of a safety net if you've skipped over something huge. They mark how well the group answered the learning objectives.