Polyak, H.
He was a Soviet pedagogue, editor, and author of a number of textbooks, such as:
Fun di Kleyne Kinders Vegn, Alefbeys far Shuln un Kinder-Hayzer (Paths for Little Children, Abcs for Schools and Children’s Homes) (Kiev: Kultur-Lige, 1923), 126 pp., second modified edition (Kiev, 1924), 90 pp.;
Pedagogishe Khrestomatye (Pedagogic Reader) (Kiev: Kultur-Lige, 1926), 297 pp.;
Arbets-Kinder (Working Children), second edition (Moscow: Emes, 1929), 266 pp.;
1, 2, 3, 4, Didaktisher Materyaln Tsum Tseyln un Rekhenen Farn Ershtn Lernyor (1, 2, 3, 4, Didactic Materials for Counting and Calculating for the First School Year) (Moscow-Kharkov-Minsk, 1930), 95 pp.;
Metodishe Onvayzungen Tsum Bikhl 1, 2, 3, 4 (Methodological Instructions for the Volume: 1, 2, 3,4) (Moscow-Kharkov-Minsk, 1930), 19 pp.
He also edited other textbooks.
Source: Chone Shmeruk, comp., Pirsumim yehudiim babrit-hamoatsot, 1917-1961 (Jewish Publications in the Soviet Union, 1917-1961) (Jerusalem, 1961), see index.