However, despite the recent improvements in literacy rates, there are still restrictions in terms of access of education for isolated nomadic communities living and moving in remote areas.

UNESCO: Herder Families Literacy and Life Skills

"The education secretary is totally isolated in his view that the English Baccalaureate certificates are a suitable measure to replace GCSEs, " she said.

BBC: MPs condemn plan to scrap GCSEs

From this list we isolated the 97 counties where more than 50% of education spending contributions come from property taxes.

FORBES: Magazine Article

Lost in the mix are the small-town farmers who reside in tiny enclaves in the isolated hills of southern Mexico, unwilling and in many cases because of poor access to education, unable to shift away from their traditional patterns of economic activity.

FORBES: Two Nations Indivisible: A Roadmap for Modern Mexico

Longo and Lopez, working for a research and public education initiative called Proyecto Coqui, have been trying to determine the health of the populations on those isolated patches.

NPR: Alarm Over Vanishing Frogs In The Caribbean