Hatha yoga taught from 1924 until his death in 1989. Among his students prominent in popularizing yoga in the West were K. Pattabhi Jois famous for popularizing the vigorous Ashtanga Vinyasa Yoga style, B. K. S. Iyengar who emphasized alignment and the use of props, Indra Devi and Krishnamacharya's son T. K. V. Desikachar. Another well-known school of Hatha yoga in the 20th-century has been the Divine Life Society founded by Swami Sivananda of Rishikesh (1887–1963) and his many disciples including, among others, Swami Vishnu-devananda – founder of International Sivananda Yoga Vedanta Centres; Swami Satyananda – of the Bihar School of Yoga;
Ashtanga vinyasa yoga the teacher is to guide as well as provide adjustments or assists in postures. In other locations, twice per week Mysore-style classes are now substituted with led classes, where the teacher takes a group through the same series at the same time. The inclusion of two led classes per week was only included in P. Jois' senior years. Usually an Ashtanga practice begins with five repetitions of Surya Namaskara A and five repetitions of Surya Namaskara B, followed by a standing sequence. Following this the practitioner begins one of six series, followed by what is called the closing sequence. The