Investigating the transformation of a secondary teacher’s knowledge of trigonometric functions

2021 ◽  
Vol 62 ◽  
pp. 100869
Author(s):  
Michael A. Tallman
Author(s):  
Yuri Morales López ◽  
Marianela Alpízar Vargas ◽  
Ana Lucía Alfaro Arce ◽  
Vicenç Font-Moll

The purpose of this presentation is to show elements associated to the study and analysis of pedagogical practices used by mathematics teachers, taking into consideration different approaches and conceptions derived from theories related to the role of the math teacher. The project highlights the need to use different strategies to analyze the processes occurring in the activities and tasks organized and implemented by the teacher. One of the main tasks in teacher training is to promote the capacity to noticing on the pedagogical activity, where noticing is understood as an inherent process to improve the quality of classroom management. In addition, different analysis models should be compared using examples and experiential practices and the different theories and research projects developed in this field related to this type of analysis. Knowing what happens in the classroom is a task inherent to the math teacher. For sure, if the teacher does not understand or is even able to perceive what is happening in the class, improvement actions are very difficult to implement. Consequently, math teachers must develop the capability of analyzing their pedagogical activity and the related elements. It is not about isolating variables and looking for causal relationships, but rather about understanding the teacher’s activity as the center of the multiple situations occurring in the classroom, which may be known more in depth, if the attention is focused on the organization, ordering, and execution of the tasks planned by the teacher. It must also be understood that the competence of analyzing mentioned here is not an isolated activity without an effect. Such analysis must be approached from an active perspective where scenarios are generated to mitigate complex situations or to value an approach different than the one happening in the classroom. Being aware that there are many aspects to analyze (most likely almost everything that happens is analyzable), we must take a stand on which situations are highly related to what happens in our classroom and which could eventually happen. With such a wide spectrum, some questions that need to be addressed are: What is important in the math education activity and who defines what is important? What elements are of interest to math teachers? How does the analysis conducted relate to the different models of the teacher's knowledge? How does our previous experience influence the assessments we make? How do we distinguish elements of interest to analysis? What is the relationship between reflecting and analyzing? At what stages of the teacher’s activity is an analysis required? What is the ultimate purpose of analyzing teaching activities? What competencies or skills are related to the analysis? What types of analysis are appropriate (content, cognitive, media, among others)? How can we balance the actions derived from the analyses we conduct? From all these questions the most important one that can guide the study of this reflection would be: What should be assessed in pedagogical activities and what is the objective of analyzing such pedagogical activities in math education?


2013 ◽  
Vol 4 (2) ◽  
pp. 20-28
Author(s):  
Farhad Soleimanian Gharehchopogh ◽  
Hadi Najafi ◽  
Kourosh Farahkhah

The present paper is an attempt to get total minimum of trigonometric Functions by Simulated Annealing. To do so the researchers ran Simulated Annealing. Sample trigonometric functions and showed the results through Matlab software. According the Simulated Annealing Solves the problem of getting stuck in a local Maxterm and one can always get the best result through the Algorithm.


Author(s):  
Mariusz Pawlak ◽  
Marcin Stachowiak

AbstractWe present general analytical expressions for the matrix elements of the atom–diatom interaction potential, expanded in terms of Legendre polynomials, in a basis set of products of two spherical harmonics, especially significant to the recently developed adiabatic variational theory for cold molecular collision experiments [J. Chem. Phys. 143, 074114 (2015); J. Phys. Chem. A 121, 2194 (2017)]. We used two approaches in our studies. The first involves the evaluation of the integral containing trigonometric functions with arbitrary powers. The second approach is based on the theorem of addition of spherical harmonics.


2021 ◽  
Vol 94 (2) ◽  
pp. 132-134
Author(s):  
Bonaventura Paolillo ◽  
Giovanni Vincenzi

2007 ◽  
Vol 44 (4) ◽  
pp. 309-333 ◽  
Author(s):  
Ruymán Cruz-Barroso ◽  
Pablo González-Vera ◽  
Olav Njåstad

Author(s):  
Tagreed Ameen Zagzoog ◽  
Rehab Mohammed Samy Elshazly ◽  
Mohammad Sayed Said Soliman

The study aimed to determine the prevalence of ADHD symptoms in Saudi children aged 6 to 13 years in Jeddah city. The study also explored the effect of variables namely teacher's knowledge, years of experience and teachers' gender on reported ADHD symptoms among primary grade students. A questionnaire survey methodology was adopted for the study. 550 children were included in the teachers' survey. Teachers assessed the ADHD symptoms in children using an 18-item scale based on DSM-V. The results indicated that the prevalence rates of ADHD among school-age differed according to ADHD subtypes. The Inattention type was rated by 35.34%, Hyperactivity/Impulsivity type was rated by 28.60%, and ADHD-C type was rated by 21.3% of the respondents. According to gender, for the Inattention subtype, the ratio between boys and girls was 1.7:1, for the Hyperactivity/Impulsivity subtype, the ratio between boys and girls was 2.03:1, and for combined subtype, the ratio between boys and girls was 2.2:1. According to the grade level, the highest prevalence of ADHD overall was found in grade three and the lowest prevalence was in grade six in all ADHD types. The present findings indicated that teachers' knowledge and gender (female) successfully predicted teacher-rated ADHD status.


Sign in / Sign up

Export Citation Format

Share Document