common heather
常见的希瑟
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Heather Crossin learned of Common Core in the fall of 2011 when her daughter brought home a math book linked to the standards that she found to be weaker than the previous textbook.
WSJ: New School Standards Spur a Backlash
应用推荐
模块上移
模块下移
不移动