Looking into tutoring, offering programs and lessons such as science or history for homeschooler groups would be a way to use your teaching skills directly working with students. You might also find you enjoy working with new immigrants on English as a second language classes. Tutoring would be good because you have the option of working through a company that offers the service or creating your own home based business or where you go to the child's home. Downside is you would need to work evenings and weekends but the upside is you would be with your own kids all day doing whatever you want. And if childcare is shared there would be only a few hours a day care was needed and the neighbourhood teen could fill in from when you need to leave and hubby/significant other comes home if that is an option.

What about offering just before and after care to start but advertise it as homework club meaning before school would be learning games and fun till bus time or walk to school and then afterschool would be help with homework - again like tutoring and then offering learning games and extension activities just like the learning centres you would have had in the classroom - let the kids do a project based on a theme they have chosen and you augment.