Question: Can you recommend a free online learning tool that offers a large library of public study sets and community features?

If you're looking for a free online learning tool with a lot of public study sets and community features, OmniSets is a great option. It's got a full flashcard system backed by AI and more than 250,000 public study sets. You can create flashcards from your own notes and the adaptive learning algorithm adjusts the pace of your studies based on how well you do. It also has practice quizzes, games and collaboration tools so you can create and manage study sets with others.

Another big name is Quizlet, which has more than 300 million users. The site uses AI to help students learn with a range of tools like Magic Notes, Q-Chat and Expert Solutions. It's got millions of verified explanations, spaced repetition and different study modes, so it's good for different learning styles. Quizlet also has community tools like Quizlet Live and Checkpoint that can be useful in a classroom setting.

Monic.ai is another all-in-one study tool that uses AI to create study materials tailored to you. You can convert lots of study materials into quizzes, flashcards and summaries. It's free for a basic plan, and pricing is flexible for students, teachers and professionals who want to improve learning.

If you're looking for something a bit more specialized, Knowt offers unlimited free learn mode, practice quizzes and spaced repetition. You can import Quizlet sets, convert lecture videos and notes into flashcards and then practice quizzes. That makes it a good option for students who want to optimize their learning and get better grades.