\input zb-basic
\input zb-matheduc
\iteman{ZMATH 2011f.00421}
\itemau{Cramer, Kathleen; Wyberg, Terry}
\itemti{Efficacy of different concrete models for teaching the part-whole construct for fractions.}
\itemso{Math. Think. Learn. 11, No. 4, 226-257 (2009).}
\itemab
Summary: The effectiveness of different concrete and pictorial models on students' understanding of the part-whole construct for fractions was investigated. Using interview data from fourth and fifth grade students from three different districts that adopted the "Mathematics Trailblazers" series, authors identified strengths and limitations of models used. Pattern blocks had limited value in aiding students' construction of mental images for the part-whole model as well as limited value in building meaning for adding and subtracting fractions. A paper fraction chart based on a paper folding model supported students' ability to order fractions with same numerators but was less useful in helping students on estimation tasks. The dot paper model and chips did not support fifth grade students' initial understanding of the algorithm.
\itemrv{~}
\itemcc{F43 F42 C73 C72}
\itemut{fractions; concept formation; grade 5; arithmetic; instructional effectiveness; interviews; student attitudes; grade 4; academic achievement; teaching methods; intermode differences}
\itemli{doi:10.1080/10986060903246479 http://www.informaworld.com/openurl?genre=article&id=doi:10.1080/10986060903246479}
\end