Order Frank Wachowiak's book, Emphasis Art, for lower grades. You will
get tons of solid ideas from that book for your lower grades. Look at
my website (www.sjs.org, click on fine arts, click on lower school art
gallery). I have a lot of photos of Elem. art on my site. Also check
Judy Decker's elementary lesson pages for lots of other school's sites
and look at their work for tons of ideas.