4. Findings
The first sub-problem was stated as “Is there a significant difference between the experimental and control
groups in terms of achievement pre-tests?” To determine if there is a statistically significant difference between the
experimental and control groups in terms of preliminary knowledge acquired with respect to the ‘Electric in our
Life’ unit, t-test was applied and the pre-test score mean for the experimental group was found as X=10,10 and that for the control group was calculated as X= 8,93 and no statistically significant difference was observed between the
experimental and control groups.
The second sub-problem of the study was stated as “Is there a significant difference between the
experimental and control groups in terms of achievement post-tests?” To determine if there is a statistically
significant difference between the post-test scores of the experimental and control groups by equalizing the pre-test
scores of the groups for the purpose of the study, ANCOVA was applied. The post-test means of the experimental
and control groups corrected according to their pre-test achievement scores are given in Table 1.