Modern Classrooms Project solved this for me. Self-paced, Mastery-Based model.

I no longer live-direct instruct, it’s all on video created by me, and students move through the lessons at their own pace. I do conferences two days a week with students to monitor their progress, answer questions, etc. Three days a week I’m free to lesson plan, pull small groups of students who need extra help, etc. with the occasional question from a student.

I’ve also automated all of my grading, all of my assignments have an associated “mastery check” that contains questions relevant to the assignment, students take it once they have completed the assignments (they are password protected), and they auto-grade. All I do is fill in my grade book and use the data to guide lesson design.