I'm not satisfied with this unit, and will be looking to beef it up next year; particularly the study of the a star life cycle. Something to do this summer!!!
However, our construction of the H-R diagram really helps students how temperature, color, and size are related.
This takes a couple of days. The graphing of the data is time-consuming, and students need some help at first. A timer is useful to help keep students focused while doing this.
We spent one class period graphing and the next processing and going over the H-R diagram.
Next year I want to do a much better job with the life cycle of stars before we do this activity. I think it will make a much more coherent flow for the kids.