The first important thing that I learned was synthesizing primary and secondary sources. I feel that this is an important skill because they are both equally important when studying history. Primary sources provide you with what happened, secondary sources provide analysis. This then allows one to add their own analysis and conclusions.
The second important thing that I learned was how to critically read sources. I learned this mainly from our Wikipedia project. It taught me to understand the bias of the writer or writers of a topic and to understand why this bias occurs.
The third important thing that I learned was understanding multiple historical perspectives when looking at different periods of time. For instance, reading both the perspectives of people in power during the Pinochet regime and the victims of the regime.