The first turning of the Wheel of Dharma is associated with the Buddha's initial teachings after his enlightenment, where he revealed the Four Noble Truths: Dukkha (suffering), Samudaya (the origin of suffering), Nirodha (the cessation of suffering), and Magga (the path to the cessation of suffering).

The second turning of the Wheel of Dharma is associated with the Buddha's teachings on the Perfection of Wisdom (Prajnaparamita), which emphasizes the importance of understanding the emptiness (sunyata) of all phenomena.

The third turning of the Wheel of Dharma is associated with the Buddha's teachings on the Tathagatagarbha Doctrine, which asserts that all beings possess the potential for enlightenment (Buddhahood) within themselves.

The Middle Way is a fundamental teaching of Buddhism that emphasizes the avoidance of extremes and the pursuit of a balanced and moderate path. While it is an important concept in Buddhism, it is not considered one of the Three Turnings of the Wheel of Dharma.

The Buddha delivered his first turning of the Wheel of Dharma in the Deer Park at Sarnath, near Varanasi, India.

The Heart Sutra is considered to be the central text of the Perfection of Wisdom teachings, known for its concise and profound exposition of the emptiness (sunyata) of all phenomena.

The Tathagatagarbha Doctrine teaches that all beings possess the potential for enlightenment (Buddhahood) within themselves, regardless of their current state or circumstances.

The Three Turnings of the Wheel of Dharma are not mutually exclusive or contradictory. They represent different aspects and stages of the Buddha's teachings, and they are all essential for the path to enlightenment.

The Buddha is said to have turned the Wheel of Dharma three times during his lifetime, each time revealing a deeper and more comprehensive understanding of the path to enlightenment.

The Three Turnings of the Wheel of Dharma provide a roadmap for the path to enlightenment, offer different perspectives on the nature of reality, and help practitioners overcome obstacles and challenges on the path.