Narrative Approach
This may be close to heresy, but instead of modeling your presentation after formats associated with scientific papers (the intro/methods/results/discussion sequence) or history texts (as a chronology), consider using formats more often associated with mystery novels.
A narrative combined with foreshadowing and flashbacks, and concluding with insightful inductive reasoning is a good recipe for telling your story. This approach allows you to illuminate the logic and insights which lead to successive steps in a more realistic and interesting manner, and it will be easier for the audience to become involved in the presentation.
A word of caution: don't let your enthusiasm for telling a story obscure the material forming the basis for your presentation.
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