When Turkey's mathematical literacy performance in PISA 2003 and 2012 is examined, it is seen that it has an increase of approximately 25 points between the two assessments. Despite this increase, the fact that the mathematics performance is below the OECD average leads to the need to determine what factors affect the mathematics performance of Turkish students. This study is aimed to investigate the factors affecting mathematics performance of Turkish students at school and school level. Initially Turkish sample consisted a total of 4848 students from 170 schools. As a result of examining the assumptions of the two-level hierarchical linear model; the data of 4236 students from 128 schools were included in the analysis. The results indicate that 64 % of the variability in mathematics achievement was found between schools. Variables associated with attitudes towards mathematics have significant effects on mathematics achievement. Mathematics self-efficacy has the most significant impacts on mathematics achievement after controlling remaining variables. For the school-level variables, proportion of mathematics teachers was found to be a strong predictor of a school's average mathematics achievement. However, it's been found that student-teacher ratio was the only negative predictor of mathematics achievement at school-level. School-level variables explained 44.1% of the variance in the between school difference in mean mathematics achievement.

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Procrastination behaviour occurs when the person is obligated to do an activity, even they are not motivated to carry out the activity within the expected time frame. Literature studies define four types of procrastination: academic, decisional, life routines, and neurotic. This study focuses on academic procrastination in higher education. Academic procrastination is mainly related to delaying academic tasks such as handing in assignments and term papers or preparing for the exams at the last moment. This study compares Turkish and international students' academic and general procrastination profiles using latent profile analysis. For this purpose, latent profiles were estimated to reveal how students from different cultures are grouped according to academic and general procrastination behaviour. A total of 691 undergraduate students, 52.4% (361) Turkish and 47.6% (330) of international students registered for an academic program in higher education participated in the study. Results indicated that while Turkish students for three latent profiles defined as Tending to enjoyable Works, Neither Lessons nor Other Works and Ambition for Academic Success. On the other hand, International students only fit two latent profiles, which are defined as Academic Procrastination Tending to Enjoyable Works and Prioritizing Academic Tasks.

ÖzBu çalışmanın amacı üstün yetenekli çocukları belirlemede öğretmen önceliklerinin tespit edilmesidir. Bu doğrultuda alanyazına ve uzman görüşüne dayalı olarak üstün yetenekli bireylere ait özellikler belirlenmiş, ardından bu öğrencileri seçmede en önemli referans kaynağı olan öğretmenlere bu kriterler sunularak onların görüşlerine göre ölçekleme yöntemi ile önem dereceleri tespit edilmiş ve bu önem derecelerinin öğretmenlerin demografik özelliklerine göre nasıl değişkenlik gösterdiği incelenmiştir. Bu amaçla ölçekleme çalışmasında üstün yetenekli öğrencilerin özellikleri yedi ifade altında toplanmıştır. Araştırmada Ankara ili merkez ilçelerinde bulunan 785 öğretmenden bu 7 özelliği ikili karşılaştırma yaparak sıralamaları istenmiştir. Yapılan ölçekleme işlemi sonunda öğretmenlerin üstün yetenekli çocukları belirlemede ilk önce tercih ettiği özellik, çevreye ve sosyal olaylara karşı duyarlı olması, son tercih ettiği özellik ise arkadaş çevresinde liderlik özelliğine sahip olması olmuştur. Öğretmenlerin demografik özelliklerine göre önem sıralamasında ise üstün yetenekli çocukları belirlemede ilk tercih edilen özellik, çevreye ve sosyal olaylara karşı duyarlı olması olmuştur. Anahtar sözcükler: Üstün yetenekli, öğretmen öncelikleri, ikili karşılaştırma, ölçekleme Teacher Priorities on Identifying Gifted Children: A Pair-Wise Comparison Method Scaling Study AbstractThe aim of the research is to determine teacher priorities on identifying gifted children. The study is based on the principle of comparison of seven different specifications which were determined by literature and professionals majored in gifted education according to the judgments of the primary and secondary school teachers using pairwise comparison method according to various demographic variable. In that particular scaling study, specifications of gifted children have been summarized in seven statements. These seven statements have been asked 785 teachers in Ankara province to compare by using pairwise comparison. As a result of scaling study, that teacher's first specification choice for nominating students as gifted has been found as awareness to nature  Sorumlu Yazar: Uzm.,

The Kaufman Brief Intelligence Test -Second Edition (KBIT-2) is designed to measure verbal and nonverbal abilities in a wide range of individuals from 4 years 0 months to 90 years 11 months of age. This study examines both the advantages of using Mokken Scale Analysis (MSA) in intelligence tests and the hierarchical order of the items in the KBIT-2: Turkish form by estimating the parameters of each of the three subtests by testing the dimensionality of the KBIT-2 subtests by using the Invariant Item Ordering (IIO) assumptions. 2850 people participated in the study, including children, adolescents, and adults. Participants' ages varied from 48 months (4 years 0 months) to 539 months (44 years 11 months). Automated Item Selection Procedure (AISP) was applied for the assessment of unidimensionality under three different lower bounds as 0.30, 0.40, and 0.55. The items of all three subtests formed a unidimensional scale. Backward Item Selection (BIS) procedure detected seven items in the Matrices and 17 items in the Verbal Knowledge, while six items in the Riddles subtest violated the IIO criteria. KBIT-2: Reliability values obtained using MSA analysis show that all three subtests have a high degree of internal consistency. However, care should be taken when IIO assumptions do not fit the intelligence scales in the original form.