If you're looking for a Khan Academy alternative, Quizlet is a good place to start. The site has a range of tools, including Magic Notes, AI-powered tutor Q-Chat and Spaced Repetition, designed to help students learn and retain information better. Quizlet also has tools for teachers, like Quizlet Live and Checkpoint, to use in the classroom.
Another tool worth considering is Knowt. It can help you learn by converting notes into flashcards and practice quizzes in subjects like Science, Language and Math. Knowt offers unlimited free learn mode, practice quizzes and spaced repetition, so it can be a good option for students who want to optimize their learning and improve grades.
If you're looking for a more advanced AI-powered learning assistant, check out Mindgrasp. It can generate notes, summaries, flashcards, quizzes and answers based on documents, videos and webinars. Mindgrasp is designed to help you learn more efficiently and be more productive, so it's good for students and professionals.
Last, GradesAI offers personalized study plans, predictive practice tests and interactive study aids to help you improve grades and learn more efficiently. It includes a predictive exam generator, interactive quizzes and a math tutor, so it can be a good study aid for students trying to stay on track and get better grades.