> Leo (Norbert's Father) had educated Norbert at home until 1903, employing teaching methods of his own invention, except for a brief interlude when Norbert was

> Leo (Norbert's Father) had educated Norbert at home until 1903, employing teaching methods of his own invention, except for a brief interlude when Norbert was 7 years of age. Earning his living teaching German and Slavic languages, Leo read widely and accumulated a personal library from which the young Norbert benefited greatly. Leo also had ample ability in mathematics and tutored his son in the subject until he left home. https://en.wikipedia.org/wiki/Norbert_Wiener#Youth https://en.wikipedia.org/wiki/Norbert_Wiener#Youth