笔者曾听过两节课,恰好两位教师执教的都是“万以内数的读法”[北师大版《数学》二年级(下册)第30页“拨一拨”],其中有许多值得深入思考的问题,现摘取其中的片断作对比分析。 The author has heard two classes, exactly two teachers coached are “read within a few million” [Beijing Normal University version of “Mathematics” second grade (second volumes) p. 30 “dial a dial”], of which Many issues that deserve further consideration are now extracted for comparative analysis.