If you are looking for teaching ideas for each month of the year - this is the place.
http://www.eduplace.com/monthlytheme/
The Houghton Mifflin Education Place web site has many resources that support Monthly Themes.
http://www2.worldbook.com/educators/
You must scroll down and use the "Through the Year" link.
Each month the World Book Online Encyclopedia highlights important dates, famous people and activities. Note: You can only access the current month.
http://www.yahooligans.com/Around_the_World/Holidays/
Learn how holidays such as Christmas, New Year, Easter, and birthdays are celebrated in different countries.
http://www.geocities.com/Heartland/Ranch/1899/theme_1.htm
Use this teacher's monthly thematic unit ideas.