Question: I'm looking for an interactive learning platform that provides a library of math problems and practice exercises.

If you're looking for an interactive learning platform with a broad library of math problems and practice exercises, Khan Academy is a great option. This free, nonprofit site covers math from Pre-K to college, with a personalized learning experience. It's geared to help students learn at their own pace and fill in gaps in their knowledge, and to give parents a way to help their kids learn.

Another option is Photomath, a math camera solver app that shows step-by-step solutions to math problems from elementary school to college. It has a number of features, including immediate answers, customizable visualizations and detailed solutions for many textbooks. The app is good for students, parents and teachers who need help with homework or want to learn math better.

For a more personalized approach, try AI Math Tutor, which uses large language models for on-demand tutoring and immediate hints. The site is designed to help students think more deeply about math by asking Socratic questions, and it tracks student progress to identify areas of difficulty. It's available on the web, Apple App Store and Google Play, so it's good for students and teachers.

Last, Mathspace offers a personalized approach that's aligned with curriculum standards. It uses adaptive learning technology to give immediate feedback, and it includes interactive textbooks for collaborative learning. It's designed to help students build confidence in math with targeted support and personalized feedback.