This is a video about vertebrates.
http://www.watchknowlearn.org/Video.aspx?VideoID=17136&CategoryID=6154
http://www.watchknowlearn.org/Video.aspx?VideoID=17136&CategoryID=6154
Watch this video about vertebrates and then take the quiz.
http://studyjams.scholastic.com/studyjams/jams/science/animals/vertebrates.htm
http://studyjams.scholastic.com/studyjams/jams/science/animals/vertebrates.htm
Watch this video about invertebrates and then take the quiz.
http://studyjams.scholastic.com/studyjams/jams/science/animals/invertebrates.htm
http://studyjams.scholastic.com/studyjams/jams/science/animals/invertebrates.htm