Among his students was the pianist Mieczysław Horszowski, who was once described as Polish „child prodigy“.
Spotz studied, as a full-scholarship recipient, at the Curtis Institute of Music with Mieczysław Horszowski, who was associated with Pablo Casals.
Mieczysław Czechowicz | Mieczysław Jastrun | Mieczysław Horszowski | Mieczysław Rakowski | Mieczysław Krawicz | Mieczysław Karłowicz | Mieczysław Weinberg | Mieczysław Wachowski | Mieczysław G. Bekker |
The list of legendary pianists he taught includes Anna Yesipova, Richard Buhlig, Ignaz Friedman, Ignacy Jan Paderewski, Artur Schnabel, Mark Hambourg, Alexander Brailowsky, Alexander Winkler, Benno Moiseiwitsch, Paul Wittgenstein, Natalia Polnazkovski and Mieczysław Horszowski.