Wikipedia has an excellent article on Waldorf education. Since an arbitration 2006/2007, where a supporter of a small anti-Waldorf fringe group in the US, that also Northern supports, was banned indefinitely from editing any Waldorf related article for his behaviour, the editors of the article can only use reliable sources for what they write in the article.
For more on Waldorf education, see Waldorf Answers (I have contributed to that site, based on my experience of Waldorf education, and the myths about it cultivated by the small American anti-Waldorf fringe group, that Northern supports and promotes in all forums she can find on the net.)
The group is described here, and the top ten+ myths they have cultivated and publish on the net since long are described here. The description is based on ten years of experience of the group.
Northern has initiated a witch hunt against Waldorf education here at Wikipedia since a number of months in all Waldorf related threads, and has been followed by a gang of supporters of the described group. They have also made raids to the TES and the BBC parenting forum. But the BBC thread was closed due to violation of BBC discussion rules and the TES thread was deleted. Northern has also made a personal raid to the Green Parent forum, but they decided they did not want her there, have banned her, and told that they would delete the latest thread where she wrote.
She and other supporters of the fringe anti-Waldorf group write frenetically here at MN. But almost no normal Mumsnetter participates or engages in the threads, where the group writes 1000s of postings to get attention.