But you are proded to buy certain recommanded books although there s no compulsion. Wouldn t hurt to check it out. This site contains free online courses on Office software. Although it is not exhaustive in nature, the courses provide a good range of expertise from basic to advance. Users will have to register before reading the courses.
Registration is free.
This site has a huge collection of Office tutorials. Unfortunately non of them are free. You are however allowed a free preview of the courses. Requires a plug-in to view the courses. This free tutorial gives a good overview for beginners of Word.