If you`re near a university/college put an ad in the Union or Guild. We have a geography student who is intelligent and sensible and able to cook a simple meal. School aged children really just need supervision rather than childcare as such, so qualifications less important. The downside is that they don`t stay long on the whole.
I'm a 26 years old portuguese girl with a degree (5 years course) in Pedagogy. I absolutly love children and I know how to explore their skills! I'm very outgoing, friendly and organized! During university I've studied special needs like autism I'm going to live in London in 2nd December. If you need me or if you know someone who needs please let me know. My mother is a children doctor in Portugal and I've worked with children in Portugal too so I can give you some people who can recomend me. I'm avaiable for a personal interview because I think that's the best way for us to know each other. But I think we can find other ways, I would love to help your family! You can contact me to email@example.com