A recommended paper about RTI model

This is not a new paper (published in 2006), but it has a nice explanation, which is not too lengthy, and is accompanied by examples, of the RTI model.

  Lynn S. Fuchs, and Douglas Fuchs. Identifying Learning Disabilities With RTI. Perspectives, Winter 2006, The International Dyslexia Association.  39-43 http://olms1.cte.jhu.edu/olms/data/resource/3862/IdentifyingLD%20with%20RTI.pdf