Visit this site for relevant science demonstration videos exploring the essential concepts elementary and middle level learners (grades K–8) need to know before high school. The short (about five minutes each), engaging videos support the Next Generation Science Standards (NGSS) and address topics in life, physical, and Earth/space sciences, as well as in engineering and STEM practices. Titles include Cottonball Catapult Design Challenge, Sound and Light Travel in Waves, Why Do We See the Moon?, Seeds and the Life Cycle of Plants, and many others. Viewers can comment on the demonstrations, or ask questions (and receive help) from the FunScienceDemos! team (a.k.a. educators from Temple University’s College of Science and Technology).
Full Link: https://www.youtube.com/user/funsciencedemos