Pediatric patients with chronic health conditions often suffer from social and academic exclusion. Since disease-centered assess-ments do not allow for differentiated biopsychosocial profiling, this study aims to evaluate the psychometric quality of The School Participa-tion Scales 24/7, a novel ICF-CY-based assessment tool. Results show high fit indices for most subscales, signifying structural equality be-tween the tool and the ICF-CY. Acceptable criterion validity is given for established neuropsychological tests. Internal consistency and retest analyses revealed that most subscales reliably and stably measure the intended domains. Finally, the tool was standardized using a repre-sentative healthy sample. In summary, the S-PS 24/7 represents a useful tool for measuring school participation in pediatric patients, thereby building a profound basis for effective interventions.