Lessons from density
My prediction yesterday was correct and today was a much better day. We were able to finish what we needed to get done. Math and grammar were completed despite no one being particularly enamored of figuring the difference between simple and compound sentences and we completed our unit on density in chemistry. As you can imagine, we did a lot of sinking and floating experiments for working on density as well as a lot of weighing and using calculators for computing different substances' actual density. I'm happy to report that people are pretty secure in their use of D=m/v. Heck, I probably understand it now far better than I ever did. I've also repeated the formula out loud enough times that I am unlikely to forget it. One of the exercises had the students try to predict whether a tree branch or a grain of sand had more density. Now, we had just done a hands-on experiment with clay and wax where the smaller piece of clay was far more dense than the larger piece of wax. This...