I had a very similar problem when my eldest son was alive. He had Down Syndrome, and, while very lovable could be incredibly disruptive.
For years, I had him and a baby/toddler to deal with while trying to do school with one or two or three others. It was extremely difficult to say the very least.
My 'solutions' were many and varied over the years. That is to say there was no one solution that was completely satisfactory, educationally speaking.
One thing I'm very glad about is that, although the academic side of the education during those years may have been less thorough than I would have preferred, the family life, love and happiness were best served by having a relaxed attitude, doing what we could, when we could, and putting the emphasis on caring for everyone's emotional needs. Even if all we did for many days and weeks was look after the home and read aloud together. We would discuss many things while caring for the mundane tasks around the house - history, grammar, maths, spelling and just about everything else under the sun.
Things were not smooth-running most days and there were times I was close to despair but, you know, at the end of the day despite things being much easier now, we'd all still rather have him back.