Thanks Craig. I agree that PISA is only one source of information for the assessment of the Vietnamese education system, though a very important one (and new for Vietnam!). Other evidence suggests that there are considerable remaining governance challenges in the education system which undermine its effectiveness. For example, payments for grades and diplomas undermine the value of the information that grades and diplomas should transmit. And poor information is a key barrier to effective skills development, as we argue in "Skilling up Vietnam".