First you need to decide whether you need Data or Statistics:
Then, you need to decide what area or region are you interested in:
Based on your geography, then you need to decide which organizations might collect that data:
Finally, you should decide what time frame you are interested in:
Some assignments might require research data, statistics, or another kinds of original research.
Some data sets might be available on the web. Look for government or international organizations (like the UN or World Bank), or for non-profit organizations who might have collected the data.
Original Research articles can also be sources for primary source information and can be found in many of our databases.
Below are links to example databases (that contain original research articles) and example data/statistics websites.