I have four grown up children. Two sent their children to school, and two are home educating. The home educators do not sit their children down to formally teach, or use work sheets, because basically it's boring and it doesn't work. The children have learned to read and write and do maths, learned far more about history and geography than they probably would have at school, because it has naturally occurred because of the interests they have had. The parents helped by providing the materials they need to follow their interests. This has varied from charity shop books, library books, visits to museums, help finding websites. One child went to a martial arts class. One week the class were asked to find out the names of some of the muscles in the human body. The following week she stunned her teacher because she knew them all, and what each one did. She then 'switched off' and spent a couple of weeks cooking. This of course, meant she was practicing her reading, measuring and weighing, and science, as my son asked her questions like "Why do you have to put baking powder in that? What does it do?" Not in a teacherish way, but in a genuine enquiring way. When she didn't know the answer, she looked it up.
The point is, anyone looking in from the outside, would say "That child isn't learning anything, all she does is cook, or look at websites about anatomy, etc." she needs to sit down and do some maths or English".
Trying to do what would normally happen in school isn't working for you or your children. You are a parent in a very stressful time.
Think about what your eldest child is interested in, and ask some questions. Start some conversations. It could be "I had Barbie as well, when I was your age. I wonder when the first Barbie was made? Really? that long ago? How many years ago was that?" Reading, and maths, without the child even realising.
"If we could go on holiday, where would you like to go? Disney World? How many miles is that? What sort of aeroplane flies from Heathrow to Florida? How much would it cost for all of us to go? We can only afford to save £20 per month. How long will it take us to save enough?"
"Could you help me with this electricity bill? It says we used £200 worth in the last three months. That seems a lot. How much is that every day?"
@Peasbewithyou, basically, be kind to yourself. Your children learn new things every day, without you, or them, even realising.
Take the pressure off, forget it all for a couple of days and try to tidy up. The children, even the two year old can help, especially if you turn it into a game. "Right, you lot, I've got a big box here. Bring me all the toys that are bigger than your head/blue/smaller than your hand/made of wood/have got wheels, etc" Or "2 year old, bring me a red toy" Now bring me a yellow toy". "Five year old, can you find 30 pieces of Lego and put them on this tray?" "Eight year old, can you bring me all the books that are factual and put them in a big stack, and then bring all the fiction and sort them out so we know which ones are suitable for the 2 year old?"