3. Results
For the first research question, descriptive statistics involving means and standard deviations were used to
determine the students’ achievement levels. The results showed that the achievement mean scores of students’ on
pre-test to post-test had increased from 9.75 (SD=3.04) to 23.25 (SD=2.89), which means that most students’ post
achievement levels were near to acceptable level when considering the possible overall scores could range from 0 to
30. The post-test results (x=23.25, SD=2.89) also indicated that students gain the objectives of the topic on a level
above average. The change in achievement scores from pre to post-test for all students is presented in Table 1.
For the second research question, Wilcoxon Signed Ranks Test for Paired Samples is accepted non-parametric
because of the number of students and the p-value =0.002 (