研究发现，四到八年级的优秀教师以一种可以持续数十年的方式提高了学生们的技能。

The study found that strong teachers in the fourth through eighth grades raised the skills of their students in ways that would last for decades.

youdao

10月24日上午8时15分，我坐在本年级指导教室中，是第一个到的。

Oct. 24, 8:15 A.M. I'm sitting in homeroom and I'm the first person here.

《柯林斯英汉双解大词典》

那里有16到18岁的高中生，也有一年级的大学生。

There are high school students sixteen to eighteen years old, and first-year college students.

youdao

So historically, the course is a lot of sophomores who, like me perhaps, are realizing that they finally have time to explore beyond their own interests.

从往年数据上可以看出，上这个课程的大都是大学二年级的学生，可能跟当时的我一样，开始认识到我们终于有时间,来探究我们兴趣以外的事情。

哈佛公开课 - 计算机科学课程节选

I'm very good with kids, so teaching somewhere between kindergarten through like third grade.

我很能和孩子打成一片，所以我想教幼儿园到小学三年级的孩子。

想开精品店 - SpeakingMax英语口语达人

you know, from going to public, or Catholic school from first to eight grade.

你知道，从天主教学校换去公立学校，从一年级到八年级

现在的孩子好可怕 - SpeakingMax英语口语达人