I just submitted a donation request and am keeping my fingers crossed.
Force and Motion is the unit I'll be starting in April and know that to do is much better than reading. I am hoping to integrate the design, testing and analysis of water bottle rockets. The thing is that some of the consumeable supplies are expensive....certainly recycled 2L bottles aren't.
We'll see but I want to DO science...not just read about it. I also think it will be a great way for my students to work on their graphing skills in science, testing and journaling their results.