Although high school graduation rates are improving, many students are still not successful. Research has documented that 9th grade is a pivotal year in determining whether a student will graduate or drop out. The purpose of this randomized controlled trial was to assess the effects of a Tier 1 intervention model (freshmen success) for 9th grade students to increase school engagement, attendance, credits earned, and grade point average (GPA). This study included 1,588 students in ninth grade across 4 comprehensive high schools. Treatment schools implemented the freshmen success components: a 9th grade leadership team, a curriculum, and support from peer navigators. Control schools continued business as usual. Results showed statistically significant and educationally meaningful effects on student motivation, engagement and attendance, and a moderate-to-large effect for credits earned. However, there was no significant effect found for GPA. (PsycINFO Database Record (c) 2019 APA, all rights reserved).

中文翻译：

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提高9年级参与度和成功率的第1层干预：一项随机对照试验的结果。

尽管高中毕业率正在提高，但许多学生仍未取得成功。研究表明，九年级是决定学生毕业还是退学的关键一年。这项随机对照试验的目的是评估9年级学生的1级干预模型（新生成功）的效果，以提高学校的参与度，出勤率，学分和平均绩点（GPA）。这项研究纳入了4所综合性高中九年级的1,588名学生。治疗学校实施了新生成功的组成部分：9年级领导团队，课程和同伴导航员的支持。控制学校继续照常营业。结果显示，对学生的动机，敬业度和出勤率具有统计学意义和教育意义的影响，对获得的信用有中等到较大的影响。但是，没有发现GPA有明显效果。（PsycINFO数据库记录（c）2019 APA，保留所有权利）。