کاظم عبدالله پور

The present research has aimed to develop conceptual perceptions of measuring volume in students’ everyday life. The statistical population involved all junior high school students in Kahnouj, in the province of Kerman. The sample studied consisted of 60 female students of grades seven, eight and nine selected by means of purposive sampling. Observations, interviews and classroom discussions were the data collection tools. The methodology of the research was based on qualitative methodology, in which qualitative data analysis was done using the activity theory analysis method. Since the activity theory studies human activities in the framework of a system, and mathematical modeling is done through a cycle, the activity system of the activity theory was integrated with the modeling cycle, thus defining a modeled activity system which has been used as the tool for data analysis. The data for the study were collected over a 9-month period, the sources of which were 2 modeling activities regarding the consumption of water. In the activity systems, two elements were used -- tension (pressure, anxiety, challenge or a dispute students encounter) and modifying it -- in order to develop conceptual perceptions. Analyzing the data obtained by the research pointed out two tensions -- perceiving the formula for measuring the volume of a cylinder and reporting water consumption. The students were able to, using the modeling process and with the guidance provided by their teachers, modify the tensions that had arisen and develop the measurement of volume in their everyday lives. This research showed that mathematical modeling can prove to be an appropriate tool in the integrated curriculum and has a high capacity for the development of mathematical concepts.

The purpose of this study is to investigate the cause of students' tendency to tuition mathematics books. The methodology of study is based on mixed method (explanatory). The statistical population of study include high school students Kahnuj city (6000) and mathematics teachers of Kahnuj and Jiroft cities. In the section of quantitative, 361 high school students and in the section of qualitative, 22 teachers were selected from Kahnuj city (15) and Jiroft city (7) with purposive sampling method. From questionnaires (students) and interview (teachers) was used for data collection. The questionnaire study was designed that validity of its questions was confirmed by five people and the reliability was calculated 0.75 by Cronbach's alpha. In the analyses of quantitative and qualitative, to analyze the perspectives of teachers and students were used exploratory factor analysis and conventional content analysis. The six and seven factors were obtained by the perspectives of students and teachers, all factors of the perspective of the students were confirmed by the perspective of teachers. From the perspective of teachers and students obtained the factors of student, teacher, school, parents, textbooks, the kind of teaching of tuition books and entrance exam, these factors were effective in students' tendency towards tuition books. So, it is the necessary that to make changes in the the problem of textbooks, students' belief systems, libraries of schools, the percentage of the impact of the entrance exam on student admission, raising parents' awareness and teachers' professional knowledge, so that instead of inducing Create a spirit of memorization and superficiality in textbooks, a spirit of discovery, reasoning and thinking in students.

The purpose of this study is to investigate model of collaborative learning of handle country in the classroom with teacher assistance design. The study is a kind causal- comparative of quantities Research. The statistical population included all of the Second high school female students (957 students) of Kahnuj city. 120 students were selected by random- sampling (68 grade 10th and 52 grade 11th). The physics exam scores were used to collect data, These exams were held in November and April 2013- 2014 school year. To analyze the data, t-test, descriptive statistics and the effect size were used.The findings showed that there is significant differences between performance of students in the design teacher assistant and handle the country (p<0/01). Effect size values at the grades of the tenth, eleventh and total confirmed a significant difference, also these values expressed that The performance of students in the handle of the country's design has improved than teacher assistant design. This study emphasizes on this topic that can be created significant change in students learning by native pattern of fits country.

The aim of the present study is to examine the lived experience of the modeling cycle students with using a phenomenological approach. For this purpose, a problem called "local bread and city bread" was used that designed upon 3- year experience of the first author who lived in one of the villages located in the south-eastern part of Iran. In this research, purposive sampling was used to achieve data saturation. In this study, a total of 16 ninth grade female students (8 pairs) took part. Data of this Study collected from various sources, including participant observation, student responses, dialogue between teacher and students and semi-structured interviews. These data were analyzed through interpretation. Finding of this study show that students are capable to determine real world problem and they can make a math model for real world problem. Indeed, experience of everyday life of students helps them to visualize and interpret the bread problem. So, important findings of this study are firstly lived experience of students help them to solve the modeling problem, and secondly lived experience can fill the gap between real world and mathematical world.