I could very happily fill my days without working - I'd walk every footpath on the local area, have bike rides, read loads of books and listen to podcasts etc. I'd get much fitter, wild swim, join classes, dance etc. I'd walk friends' dogs, I'd volunteer and help at school. I'd do more in our local community - the library, museum, shopping for the elderly etc. I'd have a tidy, organised house with better planned and prepared meals and seriously organised and planned trips and holidays. I'd love to study more - there's so many things I'd like to know more about - languages, history, art...Boredom wouldn't come into it!
Alongside all that, the school day is seriously short and theres frequent holidays and insets. Secondary school doesn't mean they don't need you - in fact you can be needed more especially emotionally and as a taxi.
I haven't ever not worked - mostly full time plus. It's not always been strictly financially necessary or worth it. We've had phases where we've paid more in childcare than on our mortgage per month! And I've been effectively paying to go to work. Those who have said they can't work due to childcare--there is always a way. We've never had any family help and have had to pay for every minute of childcare. I wouldn't ever want to not work. I've trained hard, and have skills and experience that are useful. I like having a sense of purpose and I enjoy being part of a team, having colleagues and interacting with the public as me, not someone's parent. The money I earn is less essential than dh's but I feel justified in spending it as I wish without accou ting to anyone else, and I can save pots in my own isa and savings accounts separate to anything else. My DC see me do extra to pay for additional treats etc and know that my training and qualifications are what enables me to earn.
So, if it were me, regardless of finances, I'd work. I'd volunteer and develop my hobbies and interests, nourish friendships and relationships and connections to my local community. Much like I do now!