Academic Search Premier is a good, all-purpose database made by EBSCO. It is very large (over 3 million articles) and covers nearly all subject areas. It is always a good place to start your search. It has a mix of scholarly journals, popular magazines and newspapers.
If you have a topic relating to education at any level, children, or adolescents, ERIC is a great place to look. This EBSCO database is very large and includes journal articles as well as other document types.
Another EBSCO product, Mental Measurements Yearbooks (MMY) is made up of information about and reviews of over 2000 testing instruments. MMY contains information needed to evaluate test products as well as descriptive information (e.g., test purpose, publisher, pricing) and reviews written by leading content area experts.
In most cases, you can read the first 25 pages of a dissertation. The "Order a Copy" option does not link to the PSU Interlibrary Loan System. To request a full dissertation go to the Interlibrary Loan Page and fill out a request form.