The Global Nomads Group charges for programs, but says it tries to help schools with limited resources.

VOA: special.2009.11.12

Here is what he did. Rosenthal went into a group of random schools.

他是这么做的，Rosenthal随便走进几间学校。

哈佛公开课 - 幸福课课程节选

And now a group of charter schools have formed the Green Charter Schools Network.

VOA: special.2010.01.21

"They sort of organize a group sometimes with Christian people who keep their children out of public schools and sometimes with Jewish people, and they have curriculums that you can actually study on the internet and the parents can supervise their children, that way they feel that they can protect them the best way."

VOA: standard.2010.07.12