The essays can be a learning or training exercise for the student. Required, but not graded. We had plenty in high school like this. If the student gets the AI

The essays can be a learning or training exercise for the student. Required, but not graded. We had plenty in high school like this. If the student gets the AI to do it, so be it. You'll get useless feedback and then you'll have to sit in a room and do it for real in the final exam - maybe you didn't need the practice, or maybe you'll wish you didn't waste your chances.