1 . Ran - Explaining Ha-Chodesh Haz'e La'chem - Marking the significance of the beginning of the year associated with seminal events.    

2.  R'Bechaya - Explaining the primary method that Bnai yisroel are Mekadesh Ha'Chodesh.    

3.  Abarbanel - Describing the primary method of establishing the Chodesh by answering the issues brought up by the Tzedukim.