I took my A+ at a local place. To be honest with you, I was not taught a single thing as I already knew the content was covered. If you are a self-motivated individual you can just pick up the book, study it and when you feel ready to take the test you are able to test out. There is no requirement to sit in a class in order to take the test. In fact if you felt so confident that you knew the content, you could simply schedule to take the test and complete it.
I know a lot, but just don't know about voltages and multimeters and stuff like that.