I have discovered an impressive AI tool that integrates GPT-4 into the learning process, which I highly recommend for students and teachers at all levels: 

Kaiden AI. 

This platform, which I encountered yesterday, significantly aids in lesson planning, content creation, and grading.

Key Features:

On-Demand Teaching Assistant: Provides instant responses and ideas, greatly assisting teachers in the grading process.

Production Mode: Allows the creation of effective and engaging lesson plans with minimal effort, saving weeks of work.

Create Exams and Lessons: Easily generate tests and comprehensive lessons with just a few clicks.

Additionally, a free version is available, offering up to 15 productions per month. This tool is particularly beneficial for teachers and is definitely worth trying.