AU - Chahine, Iman. AU - Post, Thomas AU - Del Mas, Robert ID - 20228 OP - 9 p. T1 - The effect of using a research-based curriculum on learning basic rational number concepts by Lebanese students [Article] UL - 1 http://search.shamaa.org/fulltext.gif http://www.qscience.com/doi/pdfplus/10.5339/nmejre.2011.3 Full text (PDF)