I took Principles of Marketing using only the questions in the complete Clep Study Guide and using the Sparks Chart for Marketing. I spent about 3 hours on it and got a 55. I'm studying Principles of Management and the IC test is really hard. I talked to my daughter who had taken it and she said all she did was the study Sparks Chart and the question in the study guide and she had no problem passing it. Anybody have any advice cause I'm totally lost with the IC test. Thanks!