The essential thought is that visitor blogging for SEO, i.e. for connections, is pretty spammy. Visitor blogging for "introduction, marking, expanded achieve, group, and so on" is still cool. I think, odds are, if the schools comprehend what they're doing and distribute an article from you, they'll likely nofollow the greater part of the connections. We nofollow all connections all alone SEO Chat blog, as well.
Digressively identified with visitor blogging are all the supported posts drifting around on web journals nowadays. A couple of months back Google punished a ton of those for without an exposure. So individuals blog and trade joins, items, cash, and administrations for presents is not obscure on Google.