Giml.org includes resources and a description of Music Learning Theory.
musicmovesforpiano.comMusic Moves for Piano is a new piano series for the 21st century that builds on Orff, Kodaly, Suzuki, and Dalcroze and applies Edwin E. Gordon's Music Learning Theory to the teaching of piano.
Resources for PDF downloads of sheet music and chord charts.
Piano Faculty at the The University of Iowa are working on an ambitious project to record 9000 pieces on youtube. It will include practically the entire teaching repertoire for beginners and intermediate pianists. New pieces are added almost daily. It will be like a music store, a fun place to browse for pieces that strike your fancy.