Question: I'm looking for a free online platform that provides a comprehensive education in math and science.

If you're looking for a free online resource for learning math and science subjects in depth, Khan Academy is a good option. The nonprofit site has a wealth of materials covering subjects from Pre-K to college-level courses in math, science and test prep. Khan Academy's adaptive technology lets students learn at their own pace, and the site offers tools for students and teachers to monitor progress and adjust instruction.

Another useful tool is Wolfram|Alpha, a computational knowledge engine that can provide step-by-step solutions and detailed explanations in subjects like math, science and technology. It can be used for everyday problems or academic research, so it's a good option for students and professionals.

If you like learning interactively, Quizlet offers tools like Magic Notes, Q-Chat and Spaced Repetition. With millions of user-created study sets, Quizlet can help you learn more effectively with spaced repetition and retrieval practice.

If you want a more personalized math experience, AI Math Tutor offers on-demand tutoring and immediate hints using large language models. The site can help students learn more critically and get feedback on areas where they need help, so it's good for students and teachers.