Our collection of 17 handouts totaling 200+ pages closely follows the official IOAA syllabus and covers the major topics that show up on the exam (and the USAAAO). For your convenience, we have divided our handouts into 5 separate categories: orbital mechanics, observational astronomy, stellar astronomy, galactic astronomy, and cosmology. Some handouts use a considerable amount of calculus, so make sure you are experienced with basic calculus before challenging yourself with them.