my 2 copper coins.. it depends on your learning style. some people need to for courses while some do some reading. for example, if you have problems using excel, would you google for "how to ..... in excel 2010" or would you go to comat (or any other provider) to enrol for a course? the "how to ...." method will not work for some people but there are tonnes of literature in CS to help.
if you want to learn more about exposure, i recommend perfect exposure by michael freeman...