We started class discussing different types of arthropods (which means jointed foot), such as arachnids, insects, crustaceans and trilobites to name a few. I had detailed instructions for the high school students for dissecting grasshoppers and a crayfish, while I had kind of let the middle school students wing it and explore on their own. I posted some videos on the middle school post that are good to watch before dissecting your own specimen. If I hadn’t watched the video for the crayfish, I never would have known to challenge my students to find the gastril mill – teeth like ridges inside the stomach of the crayfish! We found them and put them under the microscope – very cool!
This week I had students read Ch 24, Arthropods in Holt Biology or finish Ch 23 in Biology: Life on Earth. For videos, I sent them a list of True Facts About… by zefrank1, including the ones on Sea pigs, mantis shrimp, leaf katydid, dung beetle, bolas spider and carnivorous dragonflies. There is some adult language in these videos but they are very entertaining and educational.