Masters 40+ years old. Seniors 21-40 years old. Sophomores 16-20 years old. High School Year 12-13. School Leaver / University. Freshmen 13-15 years old. High School Year 9-11. Niños 10-12 years old. Intermediate school. Bambini 7-9 years old. Primary school. Pēpi 4-6 years old.