The document outlines six ways to analyze and open up a textbook for deeper understanding: 1) Compare accounts between textbooks or time periods 2) Use primary documents to challenge facts or interpretations 3) Examine where narratives begin and end 4) Identify voices left out of the narrative 5) Add more depth and context to people/events only briefly mentioned 6) Closely read word choices, titles, and other details. It also lists five questions to drive classroom discussion about a text's meaning and larger ideas.