The first practical thing we ask you to do is to film a chess scene. The purpose of this is to give you a chance to work through the production process and specifically to focus on cinematography skills.
The brief for this task is here. Pretty obviously, it pushes you towards a certain Expressionist or Noir style. That's fine; this is primarily a test of your planning and cinematogaphy skills and that dark, shadowy style is a challenge to pull off well, so if that's what you want to do, go for it. However, IB Film values creativity and independence at least as much as anything else; if you want to do something else, ignore the brief entirely. The only 'rule' is that the narrative incorporates a game of chess.
Brief for chess scene
OBJECTIVES AND ASSESSMENT
CRITERION C: Technical and Professional Skils
CRITERION D: Use of Film Language
CRITERION E: Creativity and Originality
More generally, we really want to see students working professionally through the production process: Pre-production, production, post-production. Your teacher will be paying close attention to see who is planning effectively, managing time, getting things done on time and with minimum fuss.