Some good ways to find topics include:
What about any of these piques your interest?
What causes you to ask questions?
The following are some of the best, most reliable sources of education statistics in the United States.
Data from the Census bureau (either the decennial census, the American Community Survey, or many other surveys) includes information on educational attainment by location. It is useful because census data allows you to easily connect educational attainment to other outcomes, including location, income, health, family structure, etc. There are many places and formats to download Census data; below are a few of my preferred sources.