grades are arbitrary?!!

Yep.

A "D" average is good enough to earn a diploma, according to the Seattle Public Schools.

The district is considering dropping graduation standards from a "C" average to a "D" average in order to boost the number of college-ready students.

The school board is doing its own math on the district's logic.

According to an administrator, the district wants to offer more advanced classes and raise the bar. In order to do so, it needs money. To get that money, it has to find a way to keep more kids in school. So a "D" might be good enough to graduate.

What does a "D" mean?

Some places, you pass with a C. Others, you pass with a D. Some places, a C starts at 70. Other places, a C starts at 62.

Yep. Grades are arbitrary.

Which is what makes arguments over changing grading schemes so much fun.