Question: I need a resource that provides test preparation materials for the SAT, LSAT, and MCAT - do you know of any?

For a broader resource covering SAT, LSAT and MCAT prep, Khan Academy is a great option. The nonprofit online learning platform has an extensive collection of materials for each of these tests. Khan Academy's adaptive learning technology lets students learn at their own pace and get customized learning paths. Khan Academy's resources are geared for students and teachers, so it's good for both students and for collaborative learning.

Another option is Quizlet, which uses AI to help students learn and retain information. Quizlet offers a range of tools, including Magic Notes, Q-Chat and Spaced Repetition, to help students learn. The site has millions of verified explanations and answers, and a variety of question types to suit different learning styles. Quizlet also has tools for teachers to build engaging lessons, so it's good for both individual students and group study.

If you're looking for a diagnostic test focus, R.test is an AI-based service to help students prepare for the SAT and ACT. It offers adaptive tests, detailed analytics and a large Q Bank of more than 1500 practice questions. R.test offers unlimited practice and works on a range of devices, so it's a good option for anyone who wants to track progress and get ready for a test.

You could also consider Knowt, which converts notes into flashcards and practice quizzes in subjects like math, science, history and English. It offers unlimited free learn mode, practice quizzes and spaced repetition so students can drill flashcards and review them at the best time. With tools like video summarization and AI-powered note conversion, Knowt can help students learn better and improve grades.