The pieces' range of levels of difficulty is relatively narrow so that the volume can be used continuously over a period of about two years. This is what distinguishes the Urtext Primo approach from almost all common anthologies. The selected repertoire takes into account not only pieces of the classic canon of lessons, but also lesser known works which are in no way of less importance for piano lessons. The Urtext Primo volumes are published in the internationally recognised standard of the Wiener Urtext editions.