This issue of Exception Children, we think, is exceptionally rich. There are articles examining important practices, policies, and research methods. The first three papers are about “SMART” research design, which stands for “sequential multiple-assignment randomized trial” and provides guidance about how to design analyses of multitiered programs. In our regular reports of research for this issue, we also have three articles. They examine preparing special education teachers, teaching of fractions, and policy for students with visual impairments.

中文翻译：

---

预览

我们认为，《例外儿童》这一期内容异常丰富。有一些文章研究了重要的实践、政策和研究方法。前三篇论文是关于“SMART”研究设计的，它代表“顺序多任务随机试验”，并提供有关如何设计多层程序分析的指导。在我们针对这个问题的定期研究报告中，我们也有三篇文章。他们研究了特殊教育教师的准备、分数教学和视力障碍学生的政策。