Common Core State Standards
CCSS.MATH.CONTENT.4.NF.A.1
解释为什么分数a/b通过使用视觉分数模型等于分数（n×a）/（n×b），并注意零件的数量和大小，即使两个分数本身是相同的尺寸。使用此原理识别并生成等效分数。
21教学资源s for those 'aha' moments
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教学资源
等效分数 - 饼干罐分类活动
A small group or whole-class activity to consolidate students' understanding of equivalent fractions.
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教学资源
Understanding Equivalent Fractions PowerPoint
A 25-slide editable interactive PowerPoint to use when teaching your students about equivalent fractions.
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资源包
数字对话教学资源包 - 4年级
A collection of number talks teaching resources that support meaningful and highly engaging conversations in the mathematics classroom.
