Here are the links to the HW videos- sorry for the delay. You should be able to copy and paste the links and the video will pop up. If not, go to http://www.gpb.org/chemistry-physics/students/chemistry and the videos are numbered #501, 502, 601, 602, and 603.
Introduction to Bonding
The World of Atoms Is Not Enough
Ionic Formula Writing
Writing Molecular Formulas & an Introduction to Organic Molecules