In each practical session the pre test completions were
collected just before the students started using the simulations
for the practical exercises and the post tests were administered
soon after they completed all the exercises. Both the pre and
post test results were then matched against each student using
the previously assigned unique numbers to the students. Each
of the five points on the Likert scale was then assigned a
number (5: strongly agree, 4: agree, 3: neutral, 2: disagree, I;
strongly disagree). These were then used to calculate the
quantitative results using statistical methods. At the end of the
evaluation period, the same students were asked to complete an
opinion questionnaire to complement the quantitative results.