technology -- with suffiently detailed discussion of examples
style -- problems and solutions in using game mechanics
frameworks -- comparison of tools, APIs, SDKs
application(s) -- description of (existing) serious games
A discussion of the overall (societal) impact of the topic(s) discussed is highly recommended!
Make your essay available (also) as downloadable PDF, and create a one-slide or two-slide presentation of the main topic(s)!