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Abstract
The current study aims to evaluate teaching puberty components to girls in the seventh grade of  first stage high school textbooks. These components includes sexual, physical, emotional, psychological, mental (cognitive), social, religious, and civil puberty. Research method was qualitative content analysis, and the target population included all the seventh grade of  first stage high school textbooks in the school year 1394 - 1395, and among them Thinking and Lifestyle (Mutual book for boys and girls, Thinking and Lifestyle Mutual book for boys and girls), Divine Messages, Social Studies and Experimental Science were chosen. As a result, 337 puberty components were found in the chosen books. In case of evaluation of puberty with 115 (34/ 2%) components was in the first place and Religious puberty with 115(12/32%) categories had the highest amount and putative puberty with 22 categories (52/6%) had the lowest amount.
 

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The aim of this paper is to study the relationship between algebra content formation in mathematics textbooks and the mathematics teachers’ current knowledge. Based on this aim, we have considered three subjects: 1. mathematics teachers’ current knowledge of algebra, 2. the beginning and presentation methods of algebra content on the number of selected previous textbooks and 3.the role of previous textbooks content in teacher knowledge forming. Research Methodology had been a survey, content analysis, and historical and documentary analysis. This study showed that the teachers' knowledge and teaching methods do not coincide with the algebra content of the current seventh-grade mathematics textbook, and about 30% of teachers’ knowledge is based on the experiences of the previous textbooks.
 

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 In order to fully understand the concept of fraction, all of its sub-constructs must be considered and interrelated. The purpose of this study is to examine the presence of these sub-constructs and their level of use in elementary mathematics textbooks in Iran. A content analysis study based on Kieren's sub-constructs framework with five categories, namely; part-whole, measurement, ratio, quotient, and operator, was conducted to analyze all 2-6 grades’ mathematics textbooks’ activities and problems in chapters related to the concept of fraction. The results of the analysis showed that the most used sub-constructs respectively are: Part-Whole (49%), Measurement (22%), Ratio (16%), Operator (11%), Quotient (1%). There is very little attention given to the sub-construct of ‘quotient’ in these textbooks. Moreover, the potential of some sub-constructs has not been fulfilled.