Question: Is there a service that supports spaced repetition and intelligent grading for effective learning outcomes?

Quizgecko is an AI-powered question generator that offers a lot of features, including spaced repetition and intelligent grading with explanations. It can convert text files, including PDFs and DOCs, into quizzes you can share, and offers personalized learning with customizable flashcards and quizzes. It's got detailed analytics and multi-language support, so it's good for individuals and groups.

Another big option is Quizlet, an AI-powered service to help students learn and study subjects. It's got tools like Magic Notes, Q-Chat, Expert Solutions and Spaced Repetition to try to optimize learning with techniques like retrieval practice and fading guidance. Quizlet offers a variety of question types and learning modes, including full study modes and tools for teachers to create engaging classroom activities.

For a learning companion that covers more subjects, check out GradesAI. The app offers personalized study plans, interactive quizzes, flashcards and essay writing help. It's got a predictive exam generator to help learners focus on what's most important and track progress, so it's good for students who want to improve grades without wasting time.