Simplify the following text for a Grade 7 native English-speaking person.
Original: Texts dedicated to Yoga include the Bhagavad Gita , the Yoga Sutras , the Hatha Yoga Pradipika , and , as their philosophical and historical basis , the Upanishads .
Simplified: The way to do all these have been described in the two main texts of Hindu Yoga : the Bhagavad Gita and the Yoga Sutras . The Upanishads also contain important texts about yoga .