moodle/lang/it/help/quiz/grademethod.html

<P ALIGN=CENTER><B>Grading method</B></P>

<P>When multiple attempts are allowed, there are different ways
   you can use the grades to calculate the student's final 
   grade for the quiz.

<P><B>Highest grade</B><P>
<UL>
<P>The final grade is the highest (best) grade in any attempt.
</UL>

<P><B>Average grade</B><P>
<UL>
<P>The final grade is the average (simple mean) grade of all attempts.
</UL>

<P><B>First grade</B><P>
<UL>
<P>The final grade is the grade gained on the first attempt (other attempts are ignored).
</UL>

<P><B>Last grade</B><P>
<UL>
<P>The final grade is the grade gained on the most recent attempt only.
</UL>