<p>Hi, does anyone know if the grades reported on Courserank are not accurate of the portion of students who took the courses? Because it seems that there's a trend in which a lot of students got A's in the class but I don't know if it's because the group of students who choose to report their grades are more or less self-selected. Thank you!</p>

<p>The official grades (colored in green) are accurate. The unofficial grades (colored in blue) are definitely skewed to those who are interested in their GPA and to use courserank in the first place. Unofficial grades almost always show some optimistic grade distribution.</p>

<p>ohh, thank you! never noticed you could switch b/t the official and unofficial. </p>

<p>anyone else, feel free to add to this topic or respond!</p>