There are tons of great units available on the Intel Education site for inspiration and ideas. Have you tried the NCTM Illuminations site? http://illuminations.nctm.org
What activities are you hoping to do with your students throughout the lesson?
The following is a fairly new site (or at least new to me). It has some great math resources as well and may provide some direction. Keep us posted as to what you want to accompolish with your students and we will continue tossing out ideas
Good luck with your project,