The purpose of this study was to investigate the relationship between students' achievement level and the validity of students' self-assessments in the course social studies. The students were divided into two achievement groups, low-achiever and high-achiever. Low achievers were students with the grade F-D in the subject of social science and high achievers were students with the grade C-A in the subject of social science. The students had to do a test which they then had to self-assess. The questions on the test were divided into three abilities; factual knowledge, understanding and skill. The students did three self-assessments, one for each ability. The study found that there is a positive correlation between the students' level of achievement and the validity of the self-assessments. This was in line with previous research (Yao-Ting, 2010). The low achieving students overestimated an average of 0.7 grade points compared to the high achievers who overestimated an average of 0.3. The study saw a certain difference in the validity of self-assessments depending on ability, factual knowledge was the ability that the students overestimated themselves most.

The purpose of this study was to investigate the relationship between students'achievement level and the validity of students' self-assessments in the coursesocial studies. The students were divided into two achievement groups,low-achiever and high-achiever. Low achievers were students with the grade F-Din the subject of social science and high achievers were students with the gradeC-A in the subject of social science. The students had to do a test which they thenhad to self-assess. The questions on the test were divided into three abilities;factual knowledge, understanding and skill. The students did threeself-assessments, one for each ability. The study found that there is a positivecorrelation between the students' level of achievement and the validity of theself-assessments. This was in line with previous research (Yao-Ting, 2010). Thelow achieving students overestimated an average of 0.7 grade points compared tothe high achievers who overestimated an average of 0.3. The study saw a certaindifference in the validity of self-assessments depending on ability, factualknowledge was the ability that the students overestimated themselves most.

The purpose of the study is to investigate the effect of Middle East Technical University&amp / #8217 / s Science Centre (METU SC) on students&amp / #8217 / attitudes towards science. The sample (N=251) consisted of 131 males (52.2%) and 120 females (47.8%). The age range of the students varied from 11 to 14 (M=12.71, SD=0.80). The attitude scale was administered before, immediately after, and one week after a visit to METU SC. Because of the limitations on sampling procedure two different research designs were used. Design 1 was a quasi-experimental design (46 students in experimental group, 46 students in control group) and attempted to determine the impact of METU SC on 6th graders&amp / #8217 / attitudes towards science with respect to six constructs of the attitude scale. Design 2 was a weak experimental design (N=159) and attempted to determine the impact of METU SC on students&amp / #8217 / overall attitudes towards science with respect to their gender, grade levels, and science achievement scores. The results of this study suggest that METU SC has high potential on increasing middle school students&amp / #8217 / attitudes toward science in several dimensions. Furthermore, this increase is independent from gender, science achievement, and grade levels. Also considering that this achievement was accomplished in quite a short time (approximately one hour), science centres can be used by educators as an effective way of increasing students&amp / #8217 / attitudes toward science.