Everything you need to understand or teach The Great Pianists by Harold C. Schonberg.
This work of historical non-fiction was published in 1963, and updated in 1987. The historical period covered runs from 1709 when the piano was invented and first played in the 1770s by Clementi and Mozart over three centuries to the late 1980s. Author Harold C. Schonberg presents a thoroughly researched introductory panorama of piano-playing and its great pianists. Schonberg sifted through letters, notes, memoranda, tales, old recordings, and discussions with aging musicians who once heard a great pianist. He filtered a huge amount of memorabilia to separate the tales from the truth of these great pianists' lives. In the beginning there was no recording equipment to keep a pianist's music alive. The author recouped an idea of their sound from letters and notes pianists and their audience or peers wrote. Until 1889 when a primitive cylinder recording was made there was no way to hear what the early pianists sounded like.
The Great Pianists Lesson Plans contain 137 pages of teaching material, including: