I feel a disturbance in the force. (this reference is very obvious) First the increasing reference to charts, and now education . Is this a shift in your thinking, and if so why (if I am not being too nosey)? I always like to know why. Causality: action, reaction, cause and effect. Knowing why gives you power. It is what separates us from them. (this one is less obvious, but a popular one never the less).