title: Creating a Foreign Key in Django Model
body: <p>I have the following in my Student model. I want to track the date of each point given to each student. The idea would be so that I could see not only how many points each student has, but also see the date each point was given. In the future I want to see the trend of students' points. How should I go about this? Should I use a Foreign Key in another class. I am new to this so thanks for reading. </p>
  
  <pre><code>class Student(models.Model): 
    CLASS_CHOICES = ( 
      (u'Yoga','Yoga'), 
      (u'Spanish', 'Spanish'), 
      (u'French', 'French'), 
      (u'Dance', 'Dance'), 
    ) 
    name = models.CharField(max_length=30) 
    points = models.IntegerField(max_length=4) 
    classname = models.CharField("Class Name",max_length=20, choices=CLASS_CHOICES) 
  </code></pre>