http://www.learning.wales.gov.uk/resources
http://www.logovisual.com/lvt-method/what-is-lvt/
https://en.wikipedia.org/wiki/LogoVisual_thinking
https://en.wikipedia.org/wiki/Logovisual_technology
http://www.duversity.org/LVT.htm
http://www.revolvy.com/main/index.php?s=LogoVisual%20thinking