1809-4309 1809-4309 S1809-43092016000200434 10.5212/PraxEduc.v.11i2.0007 Brazil Brazil 00 08 2016 00 08 2016 11 2 434 448

19 5 5 2-14 10 2 2 329-38 57 2 2 29-30 23 3 3 373-79