My Algebra students loved this Quadratic Equation activity. It was the perfect way for my students to get some practice solving quadratic equations. I will love doing Algebra activities like this instead of regular Algebra worksheets.
Linear Equations Cost of College Project EDITABLE + optional system of equations
One of the many sites now creating real world Math lesson plans. This site is the best I've come across, and each lesson comes with an accompanying student handout and sliderocket presentation complete with video and associated student notes.