Fed up with ADHD husband | ADHD Information

I've been married 3 1/2 years to a man who has ADHD (inattentive). I
knew it going into the marriage but I didn't know it would be this hard. I
don't know if I can do this. He switched careers at age 40 to be a high
school teacher. Now I think that may have been the worst career he could
have chosen. This is his second year and he's still late for his classes,
unprepared, papers and tests are everywhere. He loses student work. He
only gets around 4 hours of sleep per night. The thing is he trys SO HARD
but it seems to get him no where. He always seems to being barely
hanging on by a thread.

He just switched from Concerta to Adderall. I hope it makes a difference
because I don't think I can spend the rest of my life being so frustrated
and disappointed. I'm constantly reminding him of appointments,
reminding him of the time, helping him with this schedule, trying to
figure out ways he can be more organized. It seems like a neverending
battle and I'm wearing thin. Any advice or insights?