Variables - http://www.youtube.com/watch?v=x2606GQmDqY
Meaning of Independent and Dependent Variables - http://www.youtube.com/watch?v=pQ8-ktmNAC4
Variables Song - http://www.youtube.com/watch?v=hwU3YL_SD70
Mr Lee - Scientific Method Song - http://www.youtube.com/watch?v=MV8lSmIo4Ac
Scientific Method Song - http://www.youtube.com/watch?v=eA86dYxrg4Q