but the £40 a week has to cover the extra things such as school meals, prescriptions, rent, council tax, 20% of her childcare costs.
She might have £40 a month more going into the bank - but she may well have much more going out just with those few things added on.
The better off calculations they do are very misleading.
I had one done 2yrs ago that said (in my circumstances then) on paper I would be £100 a week better off it I worked 16hrs a week.
Wohoo - sounds great.........
except the Lone Parent advisor pointed out that all the things is didn't take into account - like the fact I was paying £400 a month towards the mortgage, and that I would also have to pay for childcare - suddenly I became about £80 a month worse off once she added in the stuff that I would then have to pay for once I was £100 better off".
She advised me to crack on with my degree I was about to start and concetrate on that while my youngest was still at home all day.
Wmomoved - I've just realised I missed you bit about the SW thing. I'm not actually doing Social Work degree, I'm doing Health and Social Care (but geering it towards the Social Care side of things) , I'm hoping to do Family Support Work, more hands on and less paperwork
). Or something along those lines. I'm still somewhat bitter at exH for becoming ill when he did - Women's Aid were looking for volunteers for a couple of hours a week to help women who were moving out of the refuge into homes to get set up, aiding them source furniture, sort out budgets, and all the rest of it.
By the time I was in a fit state to be going anywhere near someone else that had been through a violent incident they were no longer looking for volunteers for it 
Once I get my 2nd course out of the way (start in Feb) I'll be in a better place to apply for arrange of jobs in "support" - as I'm doing Working with children, young people and families. And I know the head teacher of the SN school in town (she happens to be quite a good friend) has said that if she had someone working towards that degree who had that course under their belt (and blagged their way through the interview
) she'd certainly consider offering a job - so doors will be open