Where did Anton Webern teach and lecture during the 1920s and 1930s?

During the 1920s and 1930s, Anton Webern did not hold an appointment at the University of Vienna or the music academy. Instead, his teaching and lecturing activities were limited to the following:

• Israelitic Institute for the Blind: He held a minor position at this institution from 1925 to 1931.1
• Private Lectures: Beginning in 1932, he provided private lecture courses.1

Throughout this period, he also continued to teach private pupils, though his ability to do so was severely impacted by the political climate following the Nazi annexation of Austria in 1938.1