DOAJ 收录的OA期刊数量非常多,属于目前最好的的OA期刊目录网站。DOAJ is a community-curated online directory that indexes and provides access to high quality, open access, peer-reviewed journals.
哈佛公开课 哈佛大学公开课,远程学习平台。Study part time at Harvard, in evening or online courses. Earn a degree, professional certificate, or take a course for enrichment.
Udemy 是一个在线学习和教学市场,课程包括编程、市场营销、数据科学等。Udemy is an online learning and teaching marketplace with over 130,000 courses and 35 million students. Learn programming, marketing, data science and more.