随着《基础教育课程改革纲要（试行）》的颁布实施，改变原有单纯接受式的学习方式，建立和形成旨在充分发挥学生主体性的学习方式已成为这场教学改革的核心任务。本文就科学是什么、科学怎么学、科学如何教、科学在哪儿等有关问题，结合美国“密度”教材介绍美国孩子的科学学 With the promulgation and implementation of the “Basic Education Curriculum Reform Outline (Trial)”, changing the original simple-acceptance learning method, establishing and forming a learning method designed to give full play to the student’s subjectivity has become the core task of this teaching reform. This article discusses the science of the United States in terms of what science is, how science is learned, how science is taught, where science is concerned, and the science of American children.