Here is a list of links that are helpful to find more information about institutional research or research about assessment.

The American Association of State Colleges and Universities (AASCU)
The American Council on Education (ACE)  
The American Educational Research Association (AERA) 
Association for Institutional Research (AIR)
Association for Higher Education Effectiveness (AHEE)
The Association of American Colleges and Universities
Association of Public and Land-Grant Universities
The Carnegie Foundation for the Advancement of Teaching
The Chronicle of Higher Education
The College Board
The Consumer Price Index (CPI)  
The Delta Project on Postsecondary Education Costs, Productivity, and Accountabiity

Department of Education (DOE)
Higher Learning Commission
Indiana Association for Institutional Research (INAIR)
Indiana Commission for Higher Education (ICHE)
Integrated Post Secondary Education Data Systems (IPEDS)
National Association of College and University Business Officers (NACUBO)
National Center for Education Statistics (NCES)
National Center for Higher Education Management Systems (NCHEMS)
The National Center for Public Policy and Higher Education
The National Information Center for Higher Education Policymaking and Analysis
National Institute for Learning Outcomes Assessment
National Survey of Student Engagement  
Outcomes Assessment Resources 
Postsecondary Opportunity
The Society for College and University Planning (SCUP)  
The U.S. Bureau of the Census  
U.S. News & World Report's College Rankings
Web-Based IR Resources