diff --git a/hws/04_ride_sharing/rubric.txt b/hws/04_ride_sharing/rubric.txt
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+14 pts
+ - README.txt Completed (2 pts)
+   - One of name, collaborators, or hours not filled in (-1)
+   - Two or more of name, collaborators, or hours not filled in (-2)
+ - OVERALL CLASS DECLARATION & IMPLEMENTATION AND CODING STYLE (Good class design, split into a .h and .cpp file.  Functions > 1 line are in .cpp file.  Organized class implementation and reasonable comments throughout. Correct use of const/const& and of class method const. ) (7 pts)
+   - No credit (significantly incomplete implementation) (-7)
+   - Function bodies containing more than one statement are placed in the .h file. (-2)
+   - Missing include guards in the .h file. (Or does not declare them correctly) (-1)
+   - Functions are not well documented or are poorly commented, in either the .h or the .cpp file. (-1)
+   - Improper uses or omissions of const and reference. (-1)
+   - Overly cramped, excessive whitespace, or poor indentation. (-1)
+   - Poor variable names. (-1)
+   - Contains useless comments like commented-out code, terminal commands, or silly notes. (-1)
+ - DATA REPRESENTATION (Must use std::list for the implementation.) (5 pts)
+   - No credit (significantly incomplete implementation). (-5)
+   - Does not use std::list. (-5)
+   - Uses std::vector or data structures which have not been covered in this class. (-5)
+   - Member variables are public. (-2)