How Can We Hear 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)
Where do Babies of Chickens (and Other Living Things) Come From?
[Coming Soon - anticipated release date in Spring 2018] This middle school unit kicks off with news reports of the growing prevalence of backyard chicken coops across the country. Disagreements about why some chicken eggs turn into chickens and others don't, as well competing models about what is going on inside an egg before it hatches, spark student questions and ideas for investigations that lead them to uncover the role of fertilization, food, blood, cell division, and tissue development, in supporting the growth and release of energy in embryos, as well as the growth of babies into adults, for a variety different kinds of organisms. (LS1)