1. Textbooks: Textbooks are one of the main types of learning resources in open education, including textbooks, reference books and problem sets. These textbooks are compiled by professional educational institutions or teachers, covering the knowledge of various disciplines.

2. Online courses: Online courses are another learning resource in open education, which provides online learning services through the Internet. Online courses include video, audio, text, pictures and other media forms, which can help students better understand and master knowledge.