You can write your own scenarios based on experiences you and your colleagues have encountered OR select ones from the sources below.
Scenarios -- Pre-written sources to modify or select the most appropriate for your challenges
http://www.in2edu.com/resources/thematic_units/cyber-citizenship/scenario_digital_citizenship_cards.pdf This set of scenarios comes from Australia. The PMI refers to Plusses, Minuses and Information needed.
The Matt Harris lesson plans posted and linked from Ed Surge
PDF of the same resource as above but directly from the Matt Harris website
Quia is pronounced key-ah, and is short for Quintessential Instructional Archive. Quia provides a wide variety of tools. This is a digit citizenship quiz.