Screening preschool children for potential school problems may allow early intervention. Children beginning first grade (N=980) were tested with Denver II. All with normal/ questionable results had satisfactory school performance while 26% of those with abnormal Denver II had tow school scores. 43%, 27% and 0% of children with abnormal, questionable, and normal Denver II respectively had IQ<90 on WISC-R (p=0.05). Preschool Denver II can be recommended for populations at risk. (C) 2006 Elsevier Ireland Ltd. All rights reserved.