In the US, schooling is free from grade 1 to grade 12, and school costs are paid by the cities and towns.

在美国，从小学一年级到12年级(高三)是免费的，学校的费用由所在的城市、城镇支付。

youdao

Furthermore, the cost of Microsoft Windows can prove beyond the means of many institutions, especially in K-12 (kindergarten to grade 12) and emerging markets.

此外，Microsoft Windows的费用可能超过许多机构的财力，尤其是在K - 12(幼儿园到12年级)和新兴市场。

youdao

In the us we have free compulsory public education for all children from grade 1 to grade 12. Children must stay in school through grade 12, or at least until they are 16.

美国对小学一年级到12年级的孩子实行强制性义务教育，孩子们必须在学校里读完12年，或者至少要到16岁。

youdao

It also says the drinks shouldn't be sold or marketed in schools through grade 12.

WSJ: Monster Beverage Under Fire, Sued by San Francisco

By grade 12, U.S. students were performing below the international average in both subjects and were among the lowest of the 21 countries, mostly industrialized, that tested students at this grade level.

UNESCO: II Part Analytic Section

Every year through to Grade 12, we sit three exams at the end of each term for every single subject, and the final term exam we have to pass (and pass it well), or we fail and we would have to repeat the year, while some of our friends move on.

BBC: Exam overload: Are you getting stressed out?