Y Combinator's Startup School is an online program designed to help entrepreneurs start and grow their startups. It provides educational resources, mentorship, and a supportive community for founders at various stages of their entrepreneurial journey. The program includes video lectures from successful entrepreneurs and investors, practical advice on building a startup, and opportunities for networking with other founders. Participants can also receive feedback on their progress and potentially gain access to further support from Y Combinator. It's a free resource aimed at democratizing access to startup education and fostering innovation globally. The course is available at [Startup School - The Best Resource for Founders](https://www.startupschool.org/) and the course videos are available at the [Y Combinator channel on YouTube](https://www.youtube.com/@ycombinator).