Reading Math to learn - yes, you read that right!
Resources for Using Literature to Learn Math
The best print resource I've come across to show you how to learn how to "read math" with your kids are two books by the same authors:
Read Any Good Math Lately and It's The Story That Counts by Whitin & Wilde, (K-6)
Following are articles that describe how my family has used a number of readers with a varied age range.