by the Staff of Kaplan, Inc. By the Staff of Kaplan, Inc. The Staff of Kaplan, Inc. by Stuart and the Staff of Kaplan, Inc. Staff of Kaplan,Inc. Robert Stanton and the staff of Kaplan, Inc. the staff of Kaplan Test Prep. by the staff of the Princeton Review. by the staff of The Princeton Review. by the staff of the Priceton Review.