Hi, NCteacher!
This post is from AnnWood, fellow teacher, again (We posted back and forth a few times a few months ago).

I am very impressed with the patients who continued to work!

I feel like I'm going to rain on your parade, but I do have some observations to protect yourself professionally.
Will taking the part time position affect your insurance? Your seniority? Your pension?
If you have a union representative or a human resources person, maybe you should talk to him/her about it.

If you stay working and have substitute teachers: Will you have more work- leaving plans for the sub? Mopping up after a sub doesn't complete your plan? Are your parents the type who will complain about so many subs? All of these things happened to me when I was on short-term disability. My principal actually told me about the parent complaints when I was still recuperating!

The disability rules can be convoluted. My HR lady warned me that, if I returned to work and then found that I needed to stop working, then according to the rules, I wouldn't be eligible for disability pay for the original diagnosis.

While it may be good for your mental health to continue working in some way, it might be wrong for you financially and professionally. I'm really sorry to have to mention all of these negatives...

Keep us posted. Good luck and peace to you.