10 Fat Turkeys by Tony Johnston and Rich Deas is a great counting book to introduce to your students during Thanksgiving.
Ten whimsical turkeys are sitting on a fence and one by one, they disappear.
This counting book allows children to be introduced to counting backwards from 10 to 1 and subtraction.
The illustrations in this book are great! Although the book is written for 3-5 year olds, even first and second graders would enjoy it, as well.
You can find 10 Fat Turkey's and other books like it here.