Week to view family planner, with space for each child and another line for family/adult commitments. Put everything on it. PE days, extra lessons, contact visit, social worker visits, pizza and popcorn movie night, etc.
Will help the children as well as you; they will be able to see that things are happening and that you’ve got it under control (even if you think you’re just putting out the fires not dealing with volcano underneath).
Washing - a load as soon as they are in bed, and another one first thing in the morning, soggy bedsheets a priority (and add a capful of zoflora into the wash if you’ve lots of soggy bedding, really helps deal with it still on a relatively quick wash not the three hour cycle). Tumble dryer if you don’t already have one.
Whose clothes are whose? Especially with uniforms - easy2name stick on labels (other brands exist, they’re just the ones I know!). No sewing, no ironing just unpeel and stick into the clothes label or shoe insole, etc. Socks are trickier but we go for if it fits it’s yours. Appreciate that’s not for everyone, another option is to buy each child a 5 pack slightly different (tricky with school socks but for girls, one white pair with butterflies, one with hearts, etc., boys maybe try for coloured toe and heel or one set grey, one set black.
Routine is key. The children may have been in a pretty chaotic situation, and they will attempt to recreate that in order to feel safe. But for your own sanity, try to find a routine that works for you and stick to it.
School dinners very useful. And have a plan for after school to stop it descending into chaos. You’ll find out what works best for you. Here, it’s super delicious easy snack as soon as we get in, then tv or garden until tea and a relatively early bedtime. Other people walk home the long way round and go for a big decompress in the park before heading home (I’d have snacks ready to give out at the school gates in that case).
You may find having a meal plan helps - will reassure them food is coming and that you’re on top of it. For some that’s as basic as “sausages tonight” but others will go for a fully planned week - whatever works best for you.
And try if you can to find a few minutes 1:1 with each child. Could just be grabbing one to help you fold laundry or taking another to the corner shop to help with the bags.
Keep a basic diary somewhere - I use my phone. Write down the things they say about their family life before coming to you, in their own words, and keep it dated. The good and bad. Also record behaviour or significant events during the day. It’ll all help social services build up a picture of the children’s needs going forwards.
And try to find something nice to do with your child whilst the others are at contact, give them the space and permission to express how they’re feeling about it all too.
Good luck!