Pat's Poster sets are the most comprehensive resource yet developed for teaching higher order thinking skills such as evaluating, analysing, synthesising, inferring, etc. The Posters link the skill, the questions to ask to guide students as they develop the skill, graphic organisers and the language students should use to demonstrate the skill.  

To purchase the poster sets, there is the option of a perpetual licence for schools, or an individual licence. Individual Licences should be paid for by individual teachers, not schools, and allows for individuals to print poster sets for use within their classroom. 
A school licence means 
schools can print as many poster sets as they choose for as many years as they choose.