"The Nineteen Letters similarly affected Sarah Schenirer. From the first class she taught in the seminary until the last month of her life, Frau Schenirer taught The Nineteen Letters in one form or another. Over the years, hundreds of mimeographed copies of Rav Hirsch's writings were
used in the Cracow seminary. Furthermore, the entire Bais Yaakov curriculum was designed by Dr. Deutschlander, another ardent student of Rav Hirsch's writings."
Rebbetzin Vichna Kaplan: The Founder of the Bais Yaakov Movement in America by Danielle S. Leibowitz and Devora Gliksman, p. 81
"Vichna Kaplan (1913 – August 20, 1986) was an Orthodox Jewish teacher and school dean who, together with her husband Rabbi Boruch Kaplan, brought the Bais Yaakov movement to America. A prize pupil of Sarah Schenirer, the founder of Bais Yaakov in Poland, Kaplan opened the first Bais Yaakov High School in Williamsburg, New York, in 1938. She later opened the first Bais Yaakov Teachers Seminary, which provided teachers for all Bais Yaakov schools that subsequently opened in America and Israel." Wiki