1809-4309 1809-4309 S1809-43092016000100151 10.5212/PraxEduc.v.11i1.0007 Brazil 00 04 2016 00 04 2016 11 1 151 170

9 2 2 1-39 1 1 1 1-17 15 2 2 4-14 57 1 1 1-21 21 73 73 209-44