The materials are for kindergarten through grade twelve. The subject areas are mathematics, science, technology, reading, language arts and languages.
该网站的资料面向幼儿园至十二年级（的教学）， 涵盖的科目有数学，科学，技术，阅读，语言艺术及各类语言。
The standards are in two subject areas, English-language arts and mathematics. They establish goals for each year from kindergarten through grade twelve.
该标准涉及英语语言艺术和数学两个学科领域，建立了从幼儿园到十二年级每年的相关标准。
Madeline Hayes’ son Kelvin is twelve. He will be entering the seventh grade.
Madeline Hayes的儿子Kelvin今年12岁，他将进入七年级。
After finishing the fifth or sixth grade, at the age of eleven or twelve, students move on to a middle school or junior high school.
读完五年级或六年级后，十一岁或十二岁时，学生进入中学即初级中学。
I am an American boy. I am twelve years old and a student of Grade six.
我是一个美国男孩，我今天十二岁，读六年级。
Steve, a twelve-year-old boy with alcoholic parents, had been 1 sine his first grade.
史蒂夫，十二岁男童和含酒精的父母已经1正弦他第一次的成绩。
Steve, a twelve-year-old boy with alcoholic parents, had been 1 sine his first grade.
史蒂夫，十二岁男童和含酒精的父母已经1正弦他第一次的成绩。
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