Although at its most basic level a synthesis involves combining two or more summaries, synthesis writing is more difficult than it might at first appear because this combining must be done in a meaningful way and the final essay must generally be thesis-driven. In composition courses, “synthesis” commonly refers to writing about printed texts, drawing together particular themes or traits that you observe in those texts and organizing the material from each text according to those themes or traits. Sometimes you may be asked to synthesize your own ideas, theory, or research with those of the texts you have been assigned. In your other college classes you'll probably find yourself synthesizing information from graphs and tables, pieces of music, and art works as well. The key to any kind of synthesis is the same.