This learning resource focuses on the significant event of the Siege of Baghdad in 1258, encouraging students to differentiate between primary and secondary sources through analysis of various excerpts. It outlines Baghdad's historical context as a pivotal center for trade and culture during the Islamic Golden Age and details the catastrophic changes brought by the Mongol invasion. Students engage in an activity that involves sorting quotes and encyclopedia entries into either primary or secondary sources, fostering critical thinking and historical analysis skills. The resource also includes a reflection component that invites students to justify their categorization using key terminology related to source analysis.