Ari teaches Jewish thought, Midrash, Talmud, Legend and Literature. He currently teaches at the Secular Yeshiva, Leo Beck Institute, Hartman Institute, and Oranim College. In the past Ari has also taught at Seminar HaKibbutzim, Givat Haiva, Eilat College, Beit Moresha in Jerusalem, Kolot, Jewish Theological Seminary (NY), and the Reconstructionist Rabbinical College (Philadelphia).
Ari has published numerous books and articles including From Jerusalem to the Edge of Heaven (in Hebrew: Alma Dee), a manifesto which tells his own story and his vision for an open-source Judaism not bound by Rabbinic authority, in which all Jews can take ownership. Ari is a known voice in Israel, steadfastly speaking out against religious monopoly and in favor of Jewish pluralism.
- From Jerusalem to the Edge of Heaven (Hebrew: Alma Dee), 2001 (republished 2011)
- Ba El HaKodesh: 36 Hidden Legends, 2005
- Trees, Earth, and Torah: A Tu B’Shvat Anthology, 1999
- Din Rodef Shalom (Law in the Pursuit of Peace), 2002