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Abstract

Recognizing the multiple interacting layers of pedagogical content knowledge, in this article, we present the findings from a study that examined the extent to which participation in case-based instruction about self-generated visual representations (VRs) supported special education pre-service teachers ( N = 25) in enhancing their (a) knowledge of VRs, specifically what and how to teach, as a strategy for solving mathematics problems, and (b) applied instructional practices, specifically analysis of student knowledge and instructional planning, about VRs for students with disabilities (SWDs) to solve mathematics problems. The data revealed that case-based instruction about VRs in a special education mathematics methods course enriched pre-service teachers personal understanding about VRs and their ability to target SWDs learning needs regarding VRs. Implications for pre-service teacher preparation and research are provided.

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... Written symbols refer to mathematical symbols and equations (Mainali, 2021). Visual representation in mathematics represents essential information about mathematical problems, including diagrams, drawings, graphs, etc. (Van Garderen et al., 2021). Therefore, representation should be treated as essential in supporting students' understanding of mathematical concepts and relationships in communicating mathematical approaches and arguments and understanding oneself and others (NCTM, 2000). ...
... This is done to make it easier for both subjects to understand and see the relationship of each information used to answer the problem. In line with Van Garderen et al., (2021), visual representations in the form of tables are tools I'in Triana Agustiningtyas, Purwanto, Sudirman used to assist students in solving verbal problems. Therefore, this needs to be done because verbal representations have a relatively low density of information, so it is more prone to confusion. ...
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... Garderen et al. highlighted the impact of case-based learning on visual representation skills. At the same time, Giancola examined PESTS' mathematical cognitive abilities, reinforcing the importance of critical thinking and problemsolving for effective teaching [25,26]. Despite these insights, existing studies tend to treat critical thinking and mathematical representation as separate constructs and do not account for how cognitive styles, such as fielddependent (FD) and field-independent (FI), influence these competencies. ...
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... Other researchers have proposed that the ability to innovate in terms of teaching patterns (e.g., online collaborative learning and flipped classrooms) and instructional strategies is necessary for pre-service teachers (Brodahl et al., 2011;H. J. Tang, 2019;van Garderen et al., 2021). ...
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This study determined the effects of the Explicit Inquiry Routine (EIR), a teaching routine, on the math performance of 14 middle-school students with math learning disabilities. The routine integrates validated mathematical teaching practices from general education (inquiry, dialogue) and special education (intensive, explicit instruction) to engage students in an interactive inquiry process across multiple modes (concrete, representation, and abstract) of illustration and manipulation to develop an understanding of the one-variable equation. A multiple-baseline-across-students design was employed. Both statistical analysis and visual inspection indicated that students' scores increased and were maintained for up to 11 weeks after instruction was terminated. In addition, students transferred their skills to textbook word problems and standardized math achievement measures.
Thesis
The purpose of this study was to investigate students' with learning disabilities (LD), average-achieving students' and gifted students' use of visual imagery while solving mathematical word problems. Additionally, the relationships between visual imagery types, spatial visualization ability and mathematical problem solving were examined.The sample included sixth-grade students (N = 66) from four urban South Florida elementary and middle schools. Students were assessed on measures of mathematics achievement, mathematical word problem-solving, visual-spatial representation, and spatial visualization. Visualization, or visual imaging, was defined as the construction and formation of images either internally (e.g., mental imagery) and/or externally (e.g., with the aid of pencil and paper).The results indicated that gifted students use significantly more visual images than average-achieving students and students with LD. Five types of visual-spatial representations were used by students while solving the mathematical word problems. They included: (a) concrete imagery, (b) action imagery, (c) kinesthetic imagery, (d) number forms, and (e) pattern imagery. Visual-spatial representations were coded as either schematic, representations that encode the spatial relations described within the problem, or pictorial, representations that encode objects or persons described in the problem. Success in mathematical word problem solving was correlated with the use of schematic representations, whereas use of pictorial representations was negatively correlated with success. Schematic representations were positively correlated with spatial visualization ability, whereas pictorial representations were negatively correlated with spatial visualization ability. Students with LD used significantly more pictorial representations than the other students. Students with LD and average-achieving students performed significantly more poorly on measures of spatial visualization ability than gifted students.This research further clarified the relationships among visual imagery, spatial ability, and mathematical problem solving. Additionally, the findings contribute to the literature related to visual imagery use and mathematical word problem solving by students with LD. The results of this study have important instructional implications for all students, but especially for students who have difficulty solving mathematical word problems.
Article
One can use classroom cases in at least three different ways: as instructional materials; as raw data in research on teacher cognition; and as catalysts that can promote change, particularly among experienced teachers. Each of these uses is based on a different epistemological tradition. Case-based instruction is an old concept in teacher education, the first casebook having been published in 1927. Classroom cases continued to be used to educate teachers over the next 50 years: as critical incidents, vignettes, protocols, and simulations. In contrast, the other two uses of classroom cases appear to be novel concepts in the field of teacher education, suggesting significant changes in the way we perceive classroom teaching and educational research. They appear to mark a growing acceptance of the ''qualitative" in teaching and in research. I use this term as Eisner (1991) does, to include that which is naturalistic, interpretive, expressive, and attentive to the particular.
Article
The purpose of this study was to investigate mathematical problem-solving characteristics of middle school students with learning disabilities. Cognitive, metacognitive, and affective characteristics of middle school students with learning disabilities and average-achieving and gifted students (n = 90) were studied to determine similarities and differences among good, average, and poor problem solvers. We included measures of mathematical achievement, reasoning, mathematical word problems, and strategy knowledge, use, and control. Results indicated that despite a positive attitude toward mathematics, students with learning disabilities differed significantly from average-achieving and gifted students in general mathematical achievement and problem solving. Results also suggested that students' poor mathematical problem solving may be related less to solution errors than to an ability to represent problems and predict appropriate solution equations and operations. Implications for research and practice are discussed.
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Lee S. Shulman builds his foundation for teaching reform on an idea of teaching that emphasizes comprehension and reasoning, transformation and reflection. "This emphasis is justified," he writes, "by the resoluteness with which research and policy have so blatantly ignored those aspects of teaching in the past." To articulate and justify this conception, Shulman responds to four questions: What are the sources of the knowledge base for teaching? In what terms can these sources be conceptualized? What are the processes of pedagogical reasoning and action? and What are the implications for teaching policy and educational reform? The answers — informed by philosophy, psychology, and a growing body of casework based on young and experienced practitioners — go far beyond current reform assumptions and initiatives. The outcome for educational practitioners, scholars, and policymakers is a major redirection in how teaching is to be understood and teachers are to be trained and evaluated. This article was selected for the November 1986 special issue on "Teachers, Teaching, and Teacher Education," but appears here because of the exigencies of publishing.
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This article provides a review of research in cognitive strategy instruction for improving mathematical problem solving for students with learning disabilities (LD). The particular focus is on one of the salient components of this instructional approach - self-regulation. Seven studies utilizing this approach for teaching problem solving to students with LD were previously evaluated to determine its status as evidence-based practice. The results of this evaluation are described, and the self-regulation component embedded in the cognitive routine for each of the studies is pre- sented. The article concludes with a discussion of several princi- ples associated with research and practice in strategy instruction and some practical considerations for implementation in schools.
Article
The goal of this study is to uncover the successes and challenges that preservice teachers are likely to experience as they unpack lesson-level mathematical learning goals (i.e., identify the subconcepts and subskills that feed into target learning goals). Unpacking learning goals is a form of specialized mathematical knowledge for teaching, an essential starting point for studying and improving one's teaching. Thirty K-8 preservice teachers completed 4 written tasks. Each task specified a learning goal and then asked the preservice teachers to complete a teaching activity with this goal in mind. For example, preservice teachers were asked to evaluate whether a student's responses to a series of mathematics problems showed understanding of decimal number addition. The results indicate that preservice teachers can identify mathematical subconcepts of learning goals in supportive contexts but do not spon- taneously apply a strategy of unpacking learning goals to plan for, or evaluate, teaching and learning. Implications for preservice education are discussed.
Article
This paper examines what it would take to expand the number of teacher leaders in mathematics, noting that one of the major obstacles facing reform in mathematics education is the lack of adequate preparation among teachers currently teaching mathematics. The paper highlights experiences that have promoted the development of three middle school mathematics teacher leaders. First, it describes the professional journey of an exceptional teacher leader with 40 years of experience in diverse school environments. Next, it examines the training of two others who are still emerging as teacher leaders. The stories underscore the reality that efforts to promote improvements in mathematics education programs will not succeed unless they are coupled with opportunities that target teachers' need to grow as professionals. All three teachers share a strong commitment to raising the level of student mathematics achievement, making personal changes and improvements to positively affect their teaching quality. All three work to evaluate their teaching and strengthen their weaknesses. Two of the teacher leaders realized that they did not know enough math to truly engage their students in meaningful mathematics discourse. The results emphasize the need for support from district leadership and continuous professional development. (Contains 11 references.) (SM)
Article
In this study, the authors examine the influence of teacher and student communication patterns, instructional practices, and teacher pedagogical content knowledge on students' mathematics learning in both general and special education mathematics classrooms. Five pre-service special education teachers in field placements and 43 students with varying disabilities participated in this study. Observations of teachers during mathematics lessons and follow-up interviews were conducted. Students in these settings completed a pretest and posttest of mathematics content taught over 6 weeks of instruction. Results reveal two sets of instructional practices, communication patterns, and teacher understandings of mathematics for teaching that differentially affected student performance. Implications are discussed for teacher education and further research. (Contains 5 tables and 1 figure.)
Article
This study involved an investigation of the relationship between the kinds of solution representations Chinese and U.S. students use and the sorts of pedagogical representations Chinese and U.S. teachers use during instruction. The findings suggest that the representations teachers use influence the representations their students use and, hence, have an impact upon the students’ problem solving. One of the practical implications of the findings is that if students are given the opportunity to construct their own representations of mathematical concepts, rules, and relationships, they also should be encouraged to develop the ability to use symbolic representations, rather than to rely on concrete ones. In addition, the finding that the Chinese teachers in this study overwhelmingly used symbolic representations for the solutions of instructional tasks, whereas the U.S. teachers relied almost exclusively on verbal explanations and pictorial representations, indicates that pedagogical practice is constrained by social and cultural factors.
Article
The purpose of this study was to investigate students' use of visual imagery while solving mathematical problems. Students with learning disabilities (LD), average achievers, and gifted students in sixth grade (N= 66) participated in this study. Students were assessed on measures of mathematical problem solving and visual-spatial representation. Visual-spatial representations were coded as either primarily schematic representations that encode the spatial relations described in the problem or primarily pictorial representations that encode persons, places, or things described in the problem. Results indicated that gifted students used significantly more visual-spatial representations than the other two groups. Students with LD used significantly more pictorial representations than their peers. Successful mathematical problem solving was positively correlated with use of schematic representations; conversely, it was negatively correlated with use of pictorial representations.
Article
Current reform efforts call for an emphasis on the use of representation in the mathematics classroom across levels and topics. The aim of the study was to examine teachers’ conceptions of representation as a process in doing mathematics, and their perspectives on the role of representations in the teaching and learning of mathematics at the middle-school level. Interviews with middle school mathematics teachers suggest that teachers use representations in varied ways in their own mathematical work and have developed working definitions of the term primarily as a product in problem solving. However, teachers’ conception of representation as a process and a mathematical practice appears to be less developed, and, as a result, representations may have a peripheral role in their instruction as well. Further, the data suggested that representation is viewed as a topic of study rather than as a general process, and as a goal for the learning of only a minority of the students—the high-performing ones. Implications for mathematics teacher education, prospective and practicing, are discussed. KeywordsRepresentation-Middle school mathematics teachers
Article
This paper describes a model for generating andaccumulating knowledge for both teaching andteacher education. The model is applied firstto prepare prospective teachers to learn toteach mathematics when they enter theclassroom. The concept of treating lessons asexperiments is used to explicate theintentional, rigorous, and systematic processof learning to teach through studying one's ownpractice. The concept of planning teachingexperiences so that others can learn fromone's experience is used to put into practicethe notion of contributing to a sharedprofessional knowledge base for teachingmathematics. The same model is then applied tothe work of improving teacher preparationprograms in mathematics. Parallels are drawnbetween the concepts emphasized for prospectiveteachers and those that are employed byinstructors who study and improve teacherpreparation experiences. In this way, parallelsalso are seen in the processes used to generatean accumulating knowledge base for teaching andfor teacher education.
Article
The purpose of this study was to examine differences in math problem solving among students with learning disabilities (LD, n = 25), low-achieving students (LA, n = 30), and average-achieving students (AA, n = 29). The primary interest was to analyze the processes students use to translate and integrate problem information while solving problems. Paraphrasing, visual representation, and problem-solving accuracy were measured in eighth grade students using a researcher-modified version of the Mathematical Processing Instrument. Results indicated that both students with LD and LA students struggled with processing but that students with LD were significantly weaker than their LA peers in paraphrasing relevant information. Paraphrasing and visual representation accuracy each accounted for a statistically significant amount of variance in problem-solving accuracy. Finally, the effect of visual representation of relevant information on problem-solving accuracy was dependent on ability; specifically, for students with LD, generating accurate visual representations was more strongly related to problem-solving accuracy than for AA students. Implications for instruction for students with and without LD are discussed.