TeachScheme! 2000

 [Used modified version of Shriram's notes.
   See friday.{tex,ps}.]

  Generative Recursion: Quick Sort 

  The Recipe: Guidance for Creative Steps
  Contrast: Structural Recursion vs Generative Recursion 

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  Abstraction: Similarities and Abstraction 
  filter: up and down 

  QuickSort with filter from Scheme
  Design Recipe