To save yourself time and money I would suggest buying the Gleim books and taking the written tests before going to a school. You have to take the Fundamentals of Instruction test (FOI) and the CFI-A test. Also there is a written test for CFI-Instrument if you want your II.. .. .My students have had success with ATP . .. .THey have schools all over the country and very intensive, short programs. One of my students after finishing his Commercial Multi-Engine rating went to ATP in Las Vegas and in 3 weeks had finished all 3 instructor ratings and two weeks later was working in San Carlos. . .. .Good Luck.