@itfeelsstupid I'm a teacher and HoD of a core subject so I absolutely understand the demands of the job. I'm full time, but I understand that 3 days doesn't equate to just 3 days work. Are you primary or secondary?
How old are your children? I am assuming they are young still?
Sorry if this advice is stuff you do/have tried but somethings that might help.
- If you can, outsource some of the house stuff e.g. send some ironing to a local ironing service - even if it's just work and school clothes.
Or, can you afford a cleaner - maybe just 2 hours a week?
*I don't have either of the above. I iron all school/work clothes on a Sunday- takes me about an hour. Hang in wardrobes- means I don't have to think about it during the week. I make sure we have enough clothes to cover the week so no mid week washing.
*Shopping- can you do online and get it delivered?
*Simplyfy meals in the week - on the days you work, soup, beans on toast, sandwiches with fruit/cheese etc is fine. On the other days, still keep it simple. I also try to cook something on a Sunday that will do a couple of days in the week e.g. a curry or bolognaise. Nothing wrong with having the same thing twice.
*School stuff - as I say, not sure if you are primary or secondary. I'm secondary.
Get in as early as you can and leave as late as possible on the days you work. Use the time to do as much as you can in school. I quite often work through lunch as well.
Set time limits for tasks - otherwise they expand to fill time! Sometimes, we have to accept good enough.
Use your PPA wisely - I don't go chatting with colleagues (unsociable maybe 😂) and plan what I am going to do in those slots.
Use self/peer/live marking in lessons. If primary, I know in some written comments are expected but try to do it as you circulate and if you have a TA, get them to help.
Check you are not being expected to do more tasks than you should be. Some schools are terrible for assigning part time staff the same as full time.
*discussion needed with your DH - yes he works a lot but there also needs to be some support for you at weekends/evenings to lessen the load.