Well, I don't have time to find it right now (gotta go run errands), but Google "Das doofe Fischlied" and see if that helps; it's intended to teach article declension and adjective endings, and it goes through nom/acc/dat in the context of a sentence to show how it works.
Ablative eats my lunch, *especially* when it could just as easily be dative. German doesn't use ablative if it can help doing so; there are always prepositions to show means or place or whatever. And ablative absolutes... grah.
And why *did* they feel the need to duplicate forms in completely different contexts?!