Brief Description: Most of the records relate to the TSBK in Vilna and its schools. A much smaller quantity relates to the central office in Warsaw, to the YSHO (Yidishe Shul Organizatsye - Yiddish School Organization), Vilna Province, and to TSYSHO schools throughout Poland. Records of the TSYSHO Central Office, Warsaw, 1921-ca. 1937: financial materials, by-laws, circulars, government communications, printed materials, clippings. Records of the TSBK Central Office, Vilna, 1920 - ca. 1938: correspondence, minutes, reports, financial materials, printed materials, curricula, pedagogical materials. Records of the TSBK schools, Vilna, 1919-1940: correspondence, student records, classwork, minutes of meetings. Schools include: Frug-Kuperstein, Dinesohn, Mathematics-Sciences Gymnasium, Humanistics (classical) Gymnasium, Yiddish Teachers Seminary. Miscellaneous materials from TSYSHO schools throughout Poland and from YSHO schools in the Vilna province, 1920s-1930s: correspondence, reports, notebooks, minutes, curricula, programs, budgets, diplomas.