The most important background knowledge that you can develop, to further your critical thinking, communication and persuasion skills, is your knowledge of human nature and human psychology.

This fact is not sufficiently emphasized in traditional approaches to critical thinking education, but it's central to the "Argument Ninja" way.

Students interested in psychology, persuasion and its relevance to contemporary politics will find the material on cognitive biases, and on tribalism, polarization and critical thinking, to be extremely valuable. 

You can find this content in video courses 3 and 4: