1979 Volume 4 Issue 1 Pages 13-17
We used tow AO cards in the present research to teach complex number for senior high school students. One of AO cards is denoted Venn Diagram (AO_1 group) and the other Number Line (AO_2 group). We examined the effect of these two AO cards by transfer test and found no significant differences. Moreover, we investigated the change of SD scores of pretest and posttest in two groups. Our findings as follows: Scales Hard-Soft, Afraid- Unafraid and Love-Hate change lower in AO_1 group and Scale Valable-Worthless in AO_2 group.