List VOL.9 (7) NO.1 (2) NO.2 (5) 【Research Article】  Three-Year-Old Children’s Development of Basic Geometric Shape Recognition      Author:Meng-Lung Lai, Chin-Wei Chang, Yi-Ling Huang, Wan-Jung Chien, Kai-Ling Hung Research Article 【中文】  Taiwanese High-School Students’ Mistakes in the Use of Logical Connectives when Solving Quadratic Equations and Inequalities      Author:Yi-An Cho, Shih-Wen Chen, Wen-Jin Yang, Pin-Yin Liao Research Article 【中文】