Is this purpouse of the Education? Don't study

And is that had two kinds of education in Brazil and one was the normal and the other was the cientifico , in the time of my Grandmother only had the normal and the kids went to school with 9 years old and came out with 18-19 years old, and in the time of my mother went to the cientifico she started with 6 years old. When I went to the school I started with 4 years old, I even went before for a school that there was nursery that could teacher untill the 4 serie, so in the cientifico we studied for 14 years, in the normal are only 10 years, my cousin went o the normal because her mother only put her in school when se was with 9 years old, so if one person finished the school with 16 years old she went to the normal, could be of another way? Is that the function of the normal cheat us in the cientifico, but imagine that went to a colege that your colleges have 9 years old is that a perfect world? Rute Bezerra de Menezes Gondim