THE KEY has been designed to help students prepare for school tests, final exams, and standardized assessments. These resources are developed using assessment items from licensed government exams, and items developed by Castle Rock Research. Currently, 32 different titles of THE KEY Student Study guides are available, each directly aligned to the respective curriculum.

In the SNAP Workbooks, lessons covering each of the course objectives, detailed explanations of concepts, and illustrative examples form the Notes. Questions that can be used as teacher-led examples, in-class problems, and homework assignments are the Problems. Solutions for all questions appear in the Solutions Manual. The SNAP Workbooks can be used in the classroom throughout the school year and serve as self-study aids for students working independently.

Computer Adaptive Assessment (CAA) is an innovative, online form of assessment in which test items are presented in a sequence that is dependent on the examinees response to the preceding item. Through this process, each examinee is administered a unique set of test items that provides an accurate measure of his or her achievement level.

INTEGRITY is an online application that performs detailed analyses of multiple-choice assessments. The comprehensive, easy-to-use reports generated by INTEGRITY offer unique professional development opportunities to clients striving to create quality assessments for their students. INTEGRITY also provides leading-edge collusion (cheating) detection features allowing clients to investigate the academic integrity of students taking multiple-choice tests.