The aim of this research is to examine digital learning materials designed by pre-service mathematics teachers with GeoGebra software through rubrics. This research was conducted using the integrative mixed method design, which allows the use of qualitative and quantitative methods together or sequentially. The study group of the research consists of 46 pre-service teachers studying in elementary mathematics education programme and attending the Computer-Assisted Mathematics Instruction course in a university. The pre-service teachers designed the materials in groups of two (23 participant per group). Semi-structured interviews were conducted with six groups determined according to the purposeful sampling selection. The data of this research were obtained using digital learning materials and semi-structured interview form used to interview pre-service teachers. Pre-service teachers were asked to prepare a material that can be used in teaching simple fractions addition with GeoGebra software. In line with the purpose of the study, the Digital Learning Material Evaluation Rubric has been developed by the researchers. When the Digital Learning Material Evaluation Rubric scores of the pre-service teachers who participated in the study were examined, it was found that there were deficiencies in the digital learning material design skills of the pre-service teachers. Pre-service teachers were less successful in terms of teaching appropriateness than structural appropriateness and programming appropriateness aspects of the digital learning materials produced.

It is known that variables such as attitudes, faith, self-efficacy, critical thinking skills, reflective thinking skills are variables used to explain the students" mathematical success and the impact rates of these variables are not the same. In this study, students' predictive power towards mathematical achievements of faith and reflective thinking skills were investigated in terms of problem solving as corresponding to these variables. Relational search model was used in the research.

Orijinal Makale* Bu makale Nurullah Yazıcı'ın Mustafa Albayrak danışmanlığında yürüttüğü "Matematik öğretmenlerinin öğretim için matematik bilgisi: Kümelerde temel kavramların analizi" başlıklı doktora tezinden üretilmiştir.

Considering that Mathematics is a multidimensional problem-solving method that can be effective in all areas of cultural life, it is of great importance because of its contribution to other sciences such as physical and social sciences. It is known that the basic concepts of mathematics, which can also be expressed as a way of life, have helped to increase the usefulness of mathematics to practical and even social sciences such as physics, chemistry, biology, economics, engineering and military, as well as their own values. In addition, if abstract subjects and concepts in mathematics are used in other sciences, concrete results can be obtained, which facilitate the labor of humans. In this case, it is useful to illustrate the mathematics of everyday life in order to understand the importance of mathematics. The word "function", which is often used in everyday life as in mathematics, is one of the basic concepts in mathematics. Relating the learned knowledge and the acquired skills related to this concept to everyday life can affect the memory duration of learned knowledge and subsequent learning. Considering the importance of the subject, a case study has been conducted with (62) students. In the study, the definition of the function and two daily life examples related to the definition were presented to the candidates in black and white. The candidates were asked to make the definition of the types of functions presented to make sampling from daily life by making analogies. Content analysis was used in the analysis of the data. In the study, it was determined that the candidates could not go beyond the ordinary in writing samples. In addition, the success rates of candidates' ability to define and write daily life examples have been quite different.

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