Get started with the following recommended databases. Last Rev. 7/5/2017.
ipl2 (Internet Public Library) ipl2 is a public service organization and a learning/teaching environment with information you can trust.
The Writer's Referene Book from Southern Illinois University Edwardsville.
Pros & Cons of Controversial Issues from ProCon.org, an organization who promote critical thinking, education, and informed citizenship by presenting research on controversial issues in a straightforward, nonpartisan, and primarily pro-con format.
Defining Critical Thinking The Critical Thinking Community is a great source for both teachers and students to check out.