Author : Eva Thanheiser
Publisher :
ISBN 13 :
Total Pages : 488 pages
Book Rating : 4.:/5 (318 download)
Book Synopsis Preservice Elementary School Teachers' Conceptions of Multidigit Whole Numbers by : Eva Thanheiser
Download or read book Preservice Elementary School Teachers' Conceptions of Multidigit Whole Numbers written by Eva Thanheiser and published by . This book was released on 2005 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: I develop a framework for preservice elementary teachers' (PSTs') conceptions of multidigit whole numbers before the PSTs enter their first mathematics course for future teachers and use that framework to describe their conceptions and their difficulties. Although PSTs have been shown to lack the understanding of multidigit whole numbers necessary to teach in ways that empower students mathematically, little is known about their conceptions. To help PSTs build a profound understanding of number, mathematics educators must be aware of their currently held conceptions. In my work, I draw upon the extensive research on children's understanding of multidigit whole numbers to explicate PSTs' conceptions of these numbers. Through two interviews each of 15 PSTs, I uncovered their conceptions of multidigit whole numbers in standard algorithms and other contexts and developed a framework for these conceptions, which fell into four broad categories: (a) each digit seen in terms of its reference unit (hundreds, tens, ones) enabling the PST to relate those reference units to one another; (b) each digit seen as a collection of ones (e.g., 389 is 300 ones and 80 ones and 9 ones); (c) some digits seen in terms of an incorrect unit type (e.g., the 8 in 389 as 8 ones instead of 80 ones or 8 tens); and (d) all digits seen only in terms of ones (e.g., 389 is 3 ones and 8 ones and 9 ones). Although the first two conceptions are correct, only the first empowers one to explain number in all contexts (e.g., to see each reference unit in terms of the next lower reference unit and thus to explain the 1-to-10 relationship between adjacent reference units). Using this framework, I discuss the PSTs' conceptions in four contexts, including standard algorithms, and their difficulties with number. Although all 15 PSTs could correctly apply the algorithms, many lacked the deep conceptual understanding needed to support children's development of place-value understanding, essential for future teachers. My framework includes a classification of PSTs' currently held conceptions of multidigit whole numbers and thus can be used to support mathematics educators who teach these students.