We strongly recommend you to have a team project meeting before the tutorial. Keep notes of the meeting, and update project documents -- the tutor will ask for those during the tutorial.
Do the following during the meeting:
On a separate note, our guidelines on dealing with technical problems:
[W4.1] Design: Models
[W4.2] Class/Object Diagrams: Basics
[W4.3] Class Diagrams: Intermediate-Level