Hi S.,
I don't know if you'd consider Carol Stream Christian Academy - a private Christian school in Carol Stream that is a preschool through elementary school - or if that's too far of a drive for you, but it would solve all of your childcare issues since they offer full-day kindergarten 5 days a week, as well as both beforecare (which I think starts at 7:30 a.m.) and aftercare (which goes until 6:00 p.m.). The extendedcare is available on an as-needed basis - i.e., you just show up early in the morning and/or leave your child there after school to utilize it (no arrangements need to be made), and they'll bill you by the hour on a monthly basis for whatever time you used - I believe it's $5/hour, and they also take YWCA vouchers if that might apply to you.
Since they cater to working parents, they also offer full-day childcare on non-major holidays when school is not in session, including winter and spring breaks, and they have a "summer camp" childcare program as well.
I know you said that the costs of full-day private kindergarten scare you, but when you consider the costs and inconvenience of covering the hours that your daughter is not in school, it may be well worth the peace of mind and convenience to you, as well as the stability for her of being able to stay in one place every day with the same group of kids. Actually, it might even come out about the same or even better costwise compared to having to cover non-school hours in other ways, and if your schedule varies from time-to-time, imagine the convenience of never having to make a phone call to change or make childcare arrangements. As a single working mother with an unpredictable schedule on a day-to-day basis, I can't say enough good about how it has made my otherwise impossible situation all work out.
On the academic and nurturing fronts, it is an amazing school. My daughter attends kindergarten there and absolutely loves it. She has been at that school since she was in their 3-year-old preschool, which the older of my two boys now attends, and my younger son will be there in 2.5 more years. I love the continuity of the same kids growing up together and being together all day every day with teachers who really love and care about them. We have families that come from all over Chicagoland to send their kids there - one even lives in Indiana and drives over an hour each way.
Particularly as an educator yourself, you might appreciate that they teach the kids to read beginning in 3-year-old preschool. The kindergarten day includes reading and math and, depending on the day of the week, art, music, PE and Spanish as well.
I can't say enough praise about the school - the teachers, administration, and academics all combine to make it a place of excellence, or I wouldn't send my children there. You can see from their website (www.carolstream-christianacademy.com) a little more of what the school is about if you are interested, and I'd also be happy to tell you more about it. The ethnic diversity there is great too - the kids are mostly African-American (probably a function of its being run by and located within an African-American, non-denominational church that draws from its own congregation), whereas the teachers and administration are mostly white.
Good luck in making your plans for the upcoming school year!
L.