Bond Polarity

I understood this on the Friday we learned it. However the following week after my brain seemed to just dump it out and made me forget all of it! I had to relearn it again. I think the second time made more sense however. It kinda confused me when the bond itself can be polar because of imbalance of charge and when one atom is more electronegative than the other and then the molecule itself is nonpolar. The trick is to look at the shape since shape determines function. If the bonds are all pointing away from each other they basically cancel out since no one atom sucks the electrons (partial negative - most electronegative atom). Also you have to remember if the shape is polar or nonpolar in general. It got confusing to me no doubt but I finally got it later on. It's a lot to handle that's for sure! But once you have that click it'll all make sense!

Helpful Links! 

Polarity

Bond Polarity and Electronegativity