Questions in materials build upon each other to promote success and enhance morale

Dear Dr. Rosenthal, Well, I'll temporarily dispense with humility and exclaim to you, I PASSED THE NATIONAL COUNSELOR EXAMINATION AND THE MARYLAND STATE LAW TEST (April 21st administration)! I just received the results today, opening the envelope with a pounding heart and trembling hands! I feel so grateful to you for writing and producing the study guide materials  and the audio discs and for doing so in such an organized and affirming manner. The way your questions build upon each other and promote success had kept up my morale and study pace. .... Again, thank you so much for your role in my achievement,