This could very easily become a Better Buy project that would compare products by the unit rates to determine the best buy, making it even more relevant and real-world appropriate. Unit rates!

Angles, Triangles, and the Start of Geometry in 6th Grade Math! Blog post about some fun new middle school math activities and classroom additions relating to geometry!

Middle School Math Madness! This is a fabulous blog. She has lots of suggestions for interactive journals/notebooks and much more. Can't wait to look into her site even more!