Even though the importance of the sampling within scientific procedure for the knowledge generation has is recognized, professionals of the social and human sciences, customarily neglect the extraction phase to a sample. In the present work we concerns very especially to accomplish an attention call on the transcendency of this problems; at the...

Use of multimedia technology in classroom is, in some contexts, highly fashionable. There are different myths about this question, like the security of these techonologies enhances learning. On the other hand, research designs used count usually on some methodological unsuitables. One neglected aspect is effect of student satisfaction from...