title: Help with rails nested forms
body: <p>I have these three models.</p>
  
  <p>Student.
  Evaluation.
  Grade (student_id, evaluatioin_id, value)</p>
  
  <p>I want to make a form so that a User can set the grade for each student of a evaluation... </p>
  
  <p>I want to keep this is as clean as possible (and restful)... </p>
  
  <p>Im open to any suggestions on how to get this done.</p>
  
  <p>Please Help.</p>