Valentine's Day Bulletin Board/Door for the Craft-Phobic Teacher - spread the love! This could easily be used at any time of year - you could have students write something they love about their class or school, an act of kindness from another student, etc
("It's a Trap!") Here is a giant mousetrap I made for decorating the classroom door for red ribbon week. Our school has a door decorating contest. Included: Large mousetrap in a PDF file, so you can take it to a FedEx kinkos and have it printed large.