I'm taking a Multivariable Calculus class and my teacher has just started Differential forms. It is not making a lot of sense, though. I have tried reading "Geometric Approach to Differential forms" by David Bachman and I have understood a bit, but I would like to get more feel of it.
I just want an introduction to the subject, not too much detail. I want to know if there are any online lectures I can see or a better book I can read from.