Leadership, Mission, Structure/Org Chart
Try the agency/department/commission website, or go straight to the U.S. Government Manual for a concise profile.
Core Statutory Law
Agencies' rules and regulations are published in the Code of Federal Regulations (CFR). The easiest way to find your agency's rules is in the electronic CFR or eCFR using these instructions:
You have to find two kinds of hearings: appointment confirmation hearings and recent hearings (at the beginning of a new administration, those will often be the same thing!). Follow these instructions to locate hearings involving your agency, then narrow the search results by date or topic. You can also search for news coverage of hearings involving your agency.
Departmental Budget Appropriations or Authority
The appendix to the Budget of the United States (The President's Budget) includes:
THEREFORE: you can get to five years' appropriations figures by looking at five years of the Budget, and pulling the actual appropriation for your agency in each of these years (see handout).
Note: You may find conflicting numbers in agency Green Books, or other documents produced by the agency. You are not required to report on these, but you may do so if you choose.
News & Think Tank Perspectives
You'll find a lot on Google. These resources can also be helpful.