The aim is to assess the differences in frequency of school lunches, the adherence to the Mediterranean diet, sport practice and the parents’ educational level in school-age children according to their weight status. 352 school-age children recruited from schools in Catalonia participated (11.99 ± 1.5 years). Body weight status groups were grouped as follows: overweight and obese (OW/OB; n=175) versus normal weight (NW(Normal Weight); n=177). The percentage of NW children who had school lunches on weekdays was significantly (p <0.001) higher than the percentage of peer children with OW/OB. The percentage of OW/OB(Overweight and Obese) children who reported to practice structured sport was significantly lower (p<0.05) than in the NW children group and the mean time spent on it as well (2.05 ± 2.36 vs. 2.99 ± 3.03 hours/week; p<0.001, respectively). No differences were found in the parental studies or the Mediterranean diet variable between groups. The results support the role of the educator at school and it is suggested that a healthy and regulated food supply could favor lower adiposity in children. Promoting physical exercise at school could also help with the degree of obesity.