Answer:
Tan’s anecdotes further her argument because they make the points in her argument personal. Which appeals to readers with a personal story of how the use of English can determine how someone is seen or treated. The anecdotes in this story make the reader feel sympathetic for Tan’s mother and the way she was treated because of her use of “broken” english.
 
        
             
        
        
        
I would say definitely use your time wisely. Make sure you are fully focused too. Though it may be difficult to focus, (I understand) try and find some outside resources that can help you bring interest into what you're learning in any subject. 
        
             
        
        
        
It's called a metaphor! :)