Quoting from an article by Chevy Weiss on Tzofiya:
Schenirer’s brother wrote a note to the Belzer Rebbe11 requesting a blessing for her plan to “educate Jewish daughters in the Jewish way.” With his response of “be blessed and successful”, she launched a school; however, it is speculated that the Rebbe did not understand the vagueness of the note as he prohibited his followers from enrolling12. She worked hard and slowly gained support around Europe, although it took several years of high assimilation rates until other Orthodox Rabbinic leaders endorsed her schools, including Rav Chaim Ozer Grodzinski (1928), the Gerrer Rebbe, Rabbi Avraham Meir Alter of Gur (1929), the Chafetz Chaim, Rav Yisrael Meir HaKohain (1933), and the Lubavitcher Rebbe (1934)13.
Footnotes:
11 Rav Issacher Dov of Belz, 1854–1927.
12 Weissman & Seidman, 2021.
13 Ginsparg-Klein, Leslie. “Sarah Schenirer and Innovative Change: The Myths and Facts – the Lehrhaus.” 12 Nov. 2019.
End of excerpt.
By the way, what is Tzofiya?
From the About page:
As opposed to other existing websites who seek to offer women a different perspective, Tzofia is faithful to Halakha, Orthodox Judaism and Daat Torah. It is headed by Dayan Shlomo Cohen, graduate of The Institute of Monetary Law and Yeshivat Hanegev, and an esteemed teacher at Neve Yerushalayim, a well-known Jerusalem-based seminary for women.