Here are some links that have ideas for Veteran Day lesson plans. I haven't spent much time at any of these links, but still wanted to share.
A to Z Teacher's Stuff
The Teacher's Guide
I found these all by searching Free Veteran's Day lesson plans.
Another idea for Thursday - if you have cable tv, CSPAN will be live at the Tomb of the Unknown Soldier and at the Vietnam Memorial - starting at 11am EST.