It has been determined that the drawings, photographs and pictures related to the subject of the continuity of the tangent function on page 68 of the Ministry of National Education’s twelfth-grade mathematics textbook contradict principles 1, 7 and 10 of Yanpar’s (2007) teaching material development principles. According to these principles, teaching materials should: i) be simple, plain, and understandable, ii) reflect real life as much as possible, and iii) be easy to develop or revise, if necessary. This study aims to develop a portable tangent bridge model to meet the needs of the subject of the continuity of the tangent function. With this aim: i) teaching with the analogies model in the design of the teaching material, ii) “this is my project” format in the development and iii) Yanpar’s (2007) principles were considered. The design of the model lasted 14 weeks. At the end of the study, a portable tangent bridge model from waste products was designed and developed. This model is thought to contribute to the teaching effectiveness of teachers (Shulman, 1987) with content knowledge alongside with pedagogical knowledge (Shulman, 1986). With this contribution, the needs of the subject as described by Taba (1962) and Tyler (1949) will be met. This model will also serve as an example of meeting the needs of the subjects of knowledge and its product, technology, as highlighted by Cahit Arf (Terzioglu &Yilmaz, 2006).

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In this study, the expectations of middle school students' parents regarding to "conceptual understanding and active student participation" "positive attitude and behavior attitude" and "authority and rule-oriented teaching" were examined. A valid and reliable threefactor instrument developed by the Aytekin, Baltaci, Altunkaya, Kiymaz and Yildiz (2016) was used in collecting parents' expectations. 749 parents participated in the study. It was found that the variables of parental gender, parental age range, and monthly income of the parents, level of loving mathematics and level of helping the child have no significant effect on the expectations. The university graduates had less authority and rule-oriented teaching expectation than the remaining parents. Besides, it is seen that the 5th grade parents had higher expectations of conceptual understanding and active participation and positive attitude and behavior than the other parents. It was determined that parents with very good past math achievement had higher expectations for "conceptual understanding and active participation" and "positive attitude and behavior". On the other hand, it is clear that the mathematical success perceived by the child's parents will have an effect on the behavior of the parents. A student who believes in learning mathematics through passive listening and memorizing rules can be more easily directed, if parent has a high expectation of active participation and conceptual learning. For that reason, educators should give importance to the family dimension that occurs outside the classroom.

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-The aim of this research was to examine the anxieties and attitudes of elementary school students towards mathematics in terms of various variables. For this purpose, mathematics attitude scale and mathematics lesson anxiety scale were conducted to total of 437 students selected from the 4th and 7th grade in Şanlıurfa in the spring semester of 2010-2011 academic year. As a result, primary school students' anxieties toward mathematics do not differ according to gender, parents' occupation, parents' education status, monthly income level and taking or not extra support course. Besides, students' anxieties toward mathematics differ according to variables of class level, number of siblings, math scores and the person who encourage them to love mathematics. The attitudes of primary school students towards mathematics do not differ according to the variables of gender, mother 's and father' s profession, parents' education status, family monthly income level, number of siblings and math scores of students. But the attitudes of primary school students towards mathematics do differ according to the variables of taking or not extra support course, class level, and the person who encourage them to love mathematics. In this research, a positive low level of relationship between anxiety and attitude towards mathematics were found.