Over the past few decades, we have witnessed a surge in publicly funded pre-K programs in the United States. Today, policy makers in 45 states and the District of Columbia have adopted them. Combin...

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美国各州采用公立学前班：事件历史分析

在过去的几十年里，我们目睹了美国公共资助的学前班课程激增。今天，45 个州和哥伦比亚特区的政策制定者已经采用了它们。结合...