They are required to explain their reasoning and how they got their answer which will be good practice for the new state assessment test. There also seemed to be a variety of problems such as discrete math that I don't cover very well in my curriculum. This site has a lot of lesson plans which are math and science and use the internet. They are at a variety of levels. It has a good description of the lesson and then the option to go to see the whole thing.
Site also has links to many other math and science lessons.
You can search or browse their collection organized by math topic or level. I found it a good starting point from which I could find a multitude of useful links. This is a specific lesson plan where the students gather information about how much they would pay for a favorite cassette then use their data and that of others across the country to integate a variety of math skills. Skills include graphing, interpreting ,best-fit line, predicting, and optimizing. Seems like a good activity where my Algebra students could practice their skills in a real life situation.