Validity of the 2 x 2 achievement goal framework for school-aged children and adolescents was examined, using self-report responses from 1,196 Korean elementary and middle school students. Confirmatory factor analysis models hypothesizing 4 distinct achievement goal factors demonstrated the best fit in all age groups. Nevertheless, achievement goals of these young students were strongly correlated with each other, regardless of the goal definition or valence. The correlation became increasingly weaker with the increasing age of the respondents. Students in Grades 1-4 endorsed a mastery-approach goal most strongly, but those in Grades 5-9 endorsed a performance-approach goal. Performance-avoidance and mastery-avoidance goals received significantly lower average ratings than did the 2 approach goals in all age groups. Whereas both mastery-approach and performance-approach goals correlated positively with self-efficacy, strategy use, and performance in math, only the performance-approach goal correlated positively with anxiety. Anxiety also correlated positively with the 2 avoidance goals. A performance-avoidance goal further demonstrated positive correlation with help-seeking avoidance, whereas a mastery-avoidance goal did so with strategy use. (Contains 7 tables.)