[Torah] Shiur (שעור ʃiˈʔuʁ, pl. shiurim, שעורים ʃiʔuˈʁim) is a lesson on any Torah topic, such as Gemara, Mishnah, halakha, Tanakh, etc. ==History== The shiur has been a primary method of teaching since Mishnaic times. In a famous Talmudic passage, Rabbi Judah haNasi averred that he gained his sharp mind from watching Rabb...