Teller's teaching career began as a result of his first article about the American college students in northern Israel, which attracted the interest of the directors of the newly created women's division at Ohr Somayach. His folksy and entertaining style, combined with his anecdotal stories of Gedolim (Torah leaders), made him a popular instructor at the Ohr Somayach women's division and other English-speaking Jerusalem seminaries for American students. He is currently a faculty member at Michlelet Mevaseret Yerushalayim College of Jewish Studies for Women, Darchei Binah Women's School, Afikei Torah Women's School for Advanced Torah Studies, Midreshet Moriah, Michlala-Jerusalem College, Bnot Torah Institute, Neve Yerushalayim, and Naaleh Online Torah School. He is also an instructor at Yeshivat Hakotel for men. Teller has made over 100 "shidduchim" among his students and other young people.