The best use of government data in a hack which educates the community about a topical issue. Ideally your hack should be able to be used to engage and educate school children; other than this, you are limited only by your imagination and your data hacking skills.
Here are some ideas: (1)Traffic accident statistics could be used to educate people about the dangers of texting and driving. (2) Antarctic measurements, sea temperatures or other data might inform debates about global warming. (3) Health data might be used to highlight the incidence of diseases like melanoma in Queensland.
More information and selected datasets are available from https://data.qld.gov.au/data-event/govhack/2016.
You must use at least one of the data sets provided for this challenge hosted on http://data.qld.gov.au, but you are free to use data from the official GovHack list or any other data sets as long as their licensing terms permit.