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The final presentation is not meant to be another introduction to your team. You may spend a few minutes giving background information (i.e. you do not need to explain your experimental apparatus, as you have already done so in the teach-in), but the majority of the grade for final presentations is meant for your ability to convey your team's scientific findings in a clear and educated manner.
Please post your final presentation on your team presentations wiki page as a part of the Final Wiki Update assignment.