I had previously taken the Elements 7 course in 2010 and then the CS5 course in 2012. I needed a refresher and am taking Part I and Part II of CS6 for Photographers for remedial training and because, as I start using Photoshop more in addition to Lightroom and my various plug-ins, I have new questions. Every time I study and take the quizzes, I discover new information of value to me. Thank you.