Halakhic Midrash, the rabbinic continuation of biblical law, is one of the three major literary creations of the Tannaitic period, making it one of the most important sources for Middle Hebrew. Midreshei Halakha are the ancient Jewish biblical interpretations and constitute the earliest and closest reading of the Pentateuch excluding Genesis. A study of terminology and methodology indicates the existence of two midrashic systems: D'vei R. Yishmael and D'vei R. Aqiva. We will examine the scholarly debate concerning the exact time in which midreshei halakha were composed and redacted and concerning the transfer of terminology and material between the schools. In this course we shall study selections from the cultic and purity texts from Leviticus in Sifra or Torat Kohenim and/or from Numbers in Sifrei and Sifrei Zuta. In the course of our study, we shall develop facility with midrashic terminology and midrashic logic. We shall compare the texts in the standard scholarly editions with the manuscripts of those texts, parallel material in other compositions in Middle Hebrew (Mishnah and Tosefta) and the Talmudim. Students will gain facility in reading and creating a critical apparatus. This course will demonstrate the context of ancient Jewish law in matters of purity and cultic practice for students of Hebrew Bible, Dead Sea Scrolls, and Rabbinics.