Performance measurement: estimates and uncertainty

Pinellas County’s 2014 Outstanding Educator Kevin Ford had a VAM score of 2.55 percent…. Ford’s score of 2.55 percent came with a margin of error of 50.03 percentage points, a statistic the state refers to as “standard error.”

In Pasco County, Teacher of the Year finalist James Washington received a score of minus 9.58 percent, with a standard of error of 20.17 percent.

Tampa Bay Times.