中文摘要
尽管许多教育项目已展现出提高学生学习成效的潜力，但成功实现规模化推广的案例仍然很少。我们研究了一个基于家庭的阅读项目规模化推广的可行性，该项目此前在一个地方政府辖区内开展的实验中取得了令人期待的结果。通过在丹麦公立学校全体二年级儿童（n=51,312）中开展的一项全国性实验，我们发现，该干预在大规模实施时效果有所减弱。我们就规模化推广受限的潜在原因提供了证据，这些证据提示，学校和家长的参与率均偏低，是成功实现规模化推广的最重要障碍。
Abstract
Abstract Although many educational programs have demonstrated the potential to increase student learning, few examples of successful scaling exist. We study the scalability of a home-based reading program that has shown promising results in an experiment within a local government. Using a nationwide experiment among the full population of 2nd-grade children in Danish public schools (n=51,312), we find that the intervention is less effective at large scale. We provide evidence on potential explanations for the lack of scalability, which suggests that low levels of take-up among both schools and parents were the most important barriers to successful scaling.