Yr 1 and Yr 5.
We aim for a minimum of 4 hours a day, split between me and DH. We're both working and extremely busy but with fairly flexible hours, so by working most nights and part of the weekends, we just about manage to educate the children.
In some ways it was easier at the start when for weeks we had no guidance at all, so I devised classes I could teach together. It got more complicated when the Yr5 teachers started sending work, and Yr1 nothing, as since then we've had to simultaneously teach them.
Yr 5: A whole week of timetabled activity, including 4 days of White Rose maths, 4 days of English (teacher sends ppt with video links, and worksheets), plus geography, science, RE, PSHE, history etc... They're pretty good at getting on with work, but need 121 help on maths, and at least some of the classes need me to interact or actively deliver the lesson. Also preparing for 11+, which is harder than the school work.
Yr 1: School occasionally sends home a vague list of 'nice' activities, usually involving terrible messes and close parental supervision. No consideration that parents might be working and teaching yet another child, simultaneously. The list is laughable, or would be, if we weren't close to a breakdown. Naturally we have plenty of time to make, paint and furnish a Victorian dolls house, or costumes for a civil war re-enactment they want filmed.
Instead we've gone completely off-piste, teach alongside our daughter, but differentiating, or we do white rose maths we've found ourselves, or workbooks we've bought. I'm not worried about Yr1 child's educational progress, as they're very bright and well ahead, but more concerned about their engagement in education - easily bored and then disruptive. Needs intellectual stimulus or intellect turns to creative, clever, and yet expensively destructive occupations.
We've been increasingly paying for OutSchool, which has some interesting classes that keep Yr1 child engaged, and other classes that reinforce curriculum for Yr 5 child.
Both class teachers are giving feedback on work, but it's another 2 hours per week liaising with them, uploading stuff, downloading stuff etc.
It's a nightmare, and I'm just thankful Yr1 child isn't a year younger, as that would have been impossible. DH and I are exhausted and only spend 1 evening a week together. Plus side is we have a really good picture of Yr5 child's strengths and weaknesses now and can work on them. Suspect we might have had a nasty shock in the 11+ otherwise, as school reports always very positive.