Based on the assumption that school performance is a product of a constellation of cognitive as well as socioemotional skills, the present study investigated whether cognitive, language, mathematical, and socioemotional skills were predictive of subsequent school grades in Mathematics, Language, and Science in 263 children (M-Age = 7.4 years, SD = 0.65 years, Range 5-10 years; 52 % girls). Results longitudinally confirmed the significant predictive value of cognitive, language, and mathematical skills. Moreover, the study revealed that higher socioemotional skills were able to compensate relative deficits in cognitive and language skills regarding children's school grades.