How Can We Sense So Many Different Sounds From A Distance?
This middle school unit on sound starts off with students exploring a perplexing phenomenon where sounds and voices are heard coming from a paper cup and needle as a plastic disc (a record) is spun underneath it. This phenomenon fuels a series of questions and ideas for investigations to pursue about how sound is produced, how it travels, and how it is detected and encoded. (PS4)
How Do Eggs Become Chickens or Other Living Things?
[Coming Soon - anticipated release date in Summer 2018] This middle school unit begins with news reports about the growing prevalence of backyard chicken coops across the country. Disagreements about why some chicken eggs hatch into baby chickens and others do not, as well as competing models about what is going on inside eggs before they hatch, spark student questions leading to investigations of where babies of chickens come from and how they develop. These investigations help students uncover the role that food, blood, cells, and tissues play in the in the development of embryos and growth in different animals. (LS1)