The document discusses a study assessing problem solving and critical thinking skills among Vietnamese students. It found that the majority of students demonstrated basic or competent levels in these skills. However, performance on problem solving and critical thinking did not necessarily correlate with performance in academic subjects. Schools in more rural, disadvantaged areas tended to score higher in problem solving and critical thinking compared to schools in urban, advantaged areas that scored higher in math and English. The study suggests Vietnamese students may have stronger 21st century skills than implied by their high test scores alone, and that assessing these additional skills provides a more comprehensive view of school quality and effectiveness.