1809-4309 1809-4309 S1809-43092016000100215 10.5212/PraxEduc.v.11i1.0010 Brazil 00 04 2016 00 04 2016 11 1 215 241

13 38 38 252-64 2 3 3 9-26 13 37 37 59-70 3 1 1 348-62 52 52 19-24