this post by @EveryChildMattersinIowa, who had just started following me. I clicked into their map, and it led me to this page, which contains child care availability data for every state, including Illinois, which I show in this graphic.
This is an interactive map, so you can zoom into different parts of Illinois and every state. The way the Iowa group used it in a Tweet is exactly how I hope others will use maps, from the ones I make, to the ones I point to in blog articles on this site.
If you're doing this, post your link in the comments below.