Medea follows the traditional structure of a Greek tragedy: prologue, parodos, first episode and stasimon (also known as choral ode), second episode and stasimon, third episode and stasimon, fourth episode and stasimon, fifth episode and stasimon, sixth episode and stasimon, seventh episode and stasimon, and then the last scene, the exodus.

The prologue is the first scene of the play and introduces the characters. In Medea, the prologue is between the Nurse and the Pedagogue. It ends with the Nurse saying, "It brings all the greater ruin when some god feels spite toward a house" (lines 128-129). Medea laments offstage.

The parodos is the first choral scene, in which the chorus and Nurse further illustrate the plight of Medea while Medea continues to lament offstage.

Each episode and stasimon follows a call-and-response format between the plot in the episode and the chorus's interpretation of the events in the stasima.

The exodus, or final scene, depicts Medea lamenting her fate to the gods after she has killed her children and the chorus has called upon the gods to stop her.

Prologue: This is the introductory scene to a play. Usually it involves a limited number of characters that explain the necessary history to understand the current drama. In Medea this would be the scene between the Nurse ("O how I wish that ship the Argo/had never sailed off to the land of Colchis"), the Tutor ("Old slave from my mistress’ household,/why are you here, standing by the gate"), and Medea herself ("I can’t stand this pain, this misery./What do I do? I wish I could die!"). 

Parados: The first song spoken or sung by the chorus. This scene begins in Medea when the Chorus Leader comes on. 

First Episode: In an episode, characters and chorus members talk and advance the plot. It's important to remember that in Greek theatre no more than 2 or 3 characters can be onstage (besides the chorus, who weren't really onstage at all but in a separate place called the 'orchestra').

Choral Ode: A song or chant performed by the chorus. Usually this would be combined with a dance or ritual of some kind. 

Second Episode: The second scene between characters. 

Choral Ode: The second choral ode. 

(...) The rest of the play should go back and forth between episodes and choral odes. 

Exodus: Finally, at the end of the play, the chorus gives some piece of final wisdom. Here is the exodus from Medea:

      "Zeus on Olympus,
      dispenses many things.     
      Gods often contradict
      our fondest expectations.
      What we anticipate
      does not come to pass.
      What we don’t expect
      some god finds a way                                                           
      to make it happen.
      So with this story."

Medea by Euripides follows the typical structure of a Greek tragedy. It is performed by three actors who play all of the individual roles in the play and a chorus that sings and dances as a group. The play opens with a prologue, in which actors set out the main themes of the drama, followed by a parode, or entrance song, sung as the chorus enters the stage. 

The main body of the drama alternates between "episodes" in which individual actors engage in dialogue with other actors or the chorus, and choral odes sung by the chorus. Choral odes normally consist of three parts, a strophe, and antistrophe metrically identical to the strophe, and an epode; these are sung and danced by the chorus. 

After Medea departs on her chariot, the chorus sings a final epode, or exit song, as they leave the stage.