Grading scales at Chicago public elementary schools

A chart by the Chicago Sun-Times as it relates to city elementary schools. Bennett is included but now I need to offer some context:

At Chicago's Northside College Prep, the top-scoring public high school in the state, a student who scores a 90 on a test gets an A.

But at another elite college prep, Whitney Young Magnet, that same score merits just a B.

It's also a B at Robeson Achievement Academy -- a school for kids who couldn't pass eighth grade.

Number cutoffs for grades across Chicago public schools are all over the map, a first-of-its-kind Chicago Sun-Times computer analysis shows.

That's because schools are routinely snubbing the grading scales that district officials recommended in 2008 when they introduced a new electronic grading program called Gradebook, the Sun-Times found. In unleashing Gradebook, district officials inadvertently exposed a crazy quilt of grading policies.

According to the Sun-Times chart above at Bennett School 93 is an A, 87 is a B, 78 is a C, and 70 is a D. Look at most of the scales on that very chart, there really isn't a wild variation amongst the elementary schools. Then again I could just go through it with a fine toothcomb.