Presidents (not a song. Quirky True/False on GMM)
Bill of Rights (explained briefly)
Mississippi Delta and Gulf of Mexico (map/image)
Mammoth Cave (video)
San Andreas Fault (video)
7 Sentence Patterns (Essentials song)
Identity Property of Addition and Multiplication
Good Science vs. Bad Science (this is from a Christian perspective and very well done. There are many more videos by him worth checking out.)