Methodology
In this study, data collected from two sets of tests were used. The first tests were carried out during the period from September 2011 to December 2011, and the second series of tests were carried out from February 2012 to May 2012. Although the work taught progressed, the same test was used to evaluate the students. The students were evaluated on four occasions, twice for each period. In this study, the first and last test is used to establish whether the students progressed over the study period of eight months.