Özet:

The purpose of our study is to develop and use a web assisted material consisting of alternative assessment and evaluation techniques and to examine its effect on eliminating misconceptions in "Systems in our body" unit. The sample of the study consisted of a total of 160, 76 female and 84 male, students attending 6th grade in 3 different secondary schools. Quasi-experimental research method was used in the study. One of the two classes in each school was assigned as experimental group through random assignment and the other was assigned as the control group. The groups were given a three-stage concept achievement test with a reliability coefficient (KR-20) of 0.683 before and after the study as preteest and posttest. In the analysis of the data, a descriptive analysis technique was used. Pretest data showed that the misconceptions found were seen in similar rates in both control and experimental groups. On the contrary, when the post test data were analyzed, it was found that while the misconceptions of the students in the experimental groups had decreased, the decrease in the control groups was very low and in some questions, misconceptions had even increased. From this result, it can be concluded that activity-based assessment and evaluation tool is effective in decreasing misconceptions. Researchers are advised to use two or three staged tests to find out misconceptions in other units of the science lesson.

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