1809-4309 1809-4309 S1809-43092015000200383 10.5212/PraxEduc.v.10i2.0006 Brazil Brazil Brazil 00 12 2015 00 12 2015 10 2 383 403

30 30 7-20 18 18 108-16 13 27 27 23-41 14 42 42 28 76 76 291-312