The practice of Kriya Yoga involves a combination of physical postures (asanas), breath control (pranayama), and meditation techniques. Some of the specific practices that are commonly associated with Kriya Yoga include:

• Kriya Pranayamas: These are specific breathing techniques that are designed to help practitioners control their breath and their energy flow. These techniques can help to calm the mind and promote a sense of inner peace and clarity.
• Asanas: These are physical postures that are designed to help practitioners improve their physical strength and flexibility, and to promote a sense of balance and stability.
• Meditation: Meditation is an integral part of Kriya Yoga practice, and involves focusing the mind on a particular object, thought, or activity in order to achieve a state of inner stillness and clarity.
• Mantra repetition: Repeating certain mantras or phrases is another common practice in Kriya Yoga, and is believed to help practitioners focus their minds and connect with their own inner wisdom.
• Self-inquiry: Kriya Yoga practitioners may also engage in self-inquiry, which involves reflecting on one's own thoughts and actions in order to gain a deeper understanding of oneself and the nature of reality.

Overall, the practice of Kriya Yoga is designed to help practitioners develop concentration, control, and inner awareness, and to move closer to the goal of self-realization and enlightenment.

One of the most prominent figures in the history of Kriya Yoga is Babaji, who is said to be an immortal yogi who has been practicing and teaching Kriya Yoga for thousands of years. Babaji is said to have revived the practice of Kriya Yoga in the modern era, and is revered as a guru by many practitioners of Kriya Yoga around the world.

Other prominent teachers of Kriya Yoga include Sri Yukteswar, who was a student of Babaji and wrote extensively about the practice of Kriya Yoga; and Paramahansa Yogananda, who brought the teachings of Kriya Yoga to the West and founded the Self-Realization Fellowship, an organization that continues to teach Kriya Yoga and other spiritual practices today.

There are many other teachers and organizations that teach Kriya Yoga and offer initiation into the practice, both in India and around the world. Some of these include the Kriya Yoga Institute, the Kriya Yoga Ashram, and the Kriya Yoga Fellowship, among others.