\input zb-basic
\input zb-matheduc
\iteman{ZMATH 2012e.00591}
\itemau{Hoong, Leong Yew; Phyllis, Joseph; Ling, Lee Hui; Wei, Felicia Tan Yi; Hassan, Herma Ayuni Binte; Yih, Tay Hui}
\itemti{Lesson study on the area of a parallelogram for year 7 students.}
\itemso{Aust. Math. Teach. 68, No. 2, 14-21 (2012).}
\itemab
Summary: This article describes a lesson study on the area of a parallelogram for year 7 students. In Singapore, students in secondary schools are streamed into ability bands. Normal (academic) is the label for the middle band. The teachers were convinced that lesson study provided a valuable platform for professional development. The authors followed the key steps of the lesson study process as delineated by a number of writers. These steps include: (1) identifying the problem and setting goals; (2) designing the lesson of focus; (3) teaching, observing, and refining; and (4) sharing of results. As a lesson study team, the authors focused on the topic of mensuration and subsequently zoomed-in further to the lesson on ``area of parallelogram'' as the lesson of focus. They discuss their experiences in teaching the topic ``area of parallelogram'', especially the difficulties they faced in helping their students understand how to derive the formula ``base x height''. In the Singapore context, ``height'' is taken to mean ``perpendicular height''. The aim of this paper is to share the learning experiences of the team as they underwent the Lesson Study process. (ERIC)
\itemrv{~}
\itemcc{G33}
\itemut{plane geometry; area; polygons; teaching methods; geometric concepts; grade 7; geometry}
\itemli{http://www.aamt.edu.au/Webshop/Entire-catalogue/Australian-Mathematics-Teacher}
\end