Sit in any comfortable meditative posture and adopt Namaskara Mudra. Close the eyes. Observe your whole body and breathing. Turn your mind inwards. Begin your yoga session with chanting the following verse from Upanisads praying for the welfare of the teacher and the student:
Om sahanavavatu, Sahanou bhunaktu, Saha viryam karavavahai , Tejasvinavadhitamastu, ma vidvisavahai Om Santih, Santih, Santih.
May he protect us both (i.e., the teacher and the student). May he nourish us both. May we both work together with great energy. May our study be enlightening and fruitful. May we not hate each other. Om Peace, Peace, Peace.