The U.S. Supreme Court began a new era Monday with three women serving together for the first time, Elena Kagan taking her place at the end of the bench and quickly joining in the give-and-take.

In a scene that will repeat itself over the next few months, Kagan left the courtroom while the other justices remained to hear a case in which she will take no part. She has taken herself out of 24 pending cases, including the second of the two argued Monday, because of her work as the Obama administration’s chief lawyer prior to joining the Court in August.