A common way to think about doing research in education is to develop a proposal, collect data and then do an analysis. As the planet's digital resources continues to grow it is important to think about the availability of data that may be useful for your work.
The Australian Bureau of Statistics provides access to a large amount of its data.
There are large organisations who conduct a lot of research and who make their data freely available. A good example is the Pew Research Center's Internet and American Life Project. The data sets are available here.