Advocates for North Carolina’s public schools have boasted about the state’s graduation rate topping 80 percent for the first time in 2011-12.

But Terry Stoops says there’s more to that number than meets the eye. Stoops discussed the “high school graduation dilemma” during a presentation today to the John Locke Foundation’s Shaftesbury Society. In the video clip below, Stoops offers his theory about a major factor driving North Carolina’s public school graduation rate improvement.

2:05 p.m. update: Click play below to watch the full 51:03 event.

You’ll find other John Locke Foundation video presentations here.