On-line educational services, namely, providing courses of instruction and interactive courses of instruction at the pre-school, grade school, middle school, high school, college, graduate, post graduate, continuing education and vocational school levels in a variety of academic, topical and vocational subjects; providing courses of instruction and interactive courses of instruction in connection with test preparation via a global computer network; distribution of course materials and tests in connection with courses of instruction and interactive courses of instruction at the pre-school, grade school, middle school, high school, college, graduate, post graduate, continuing education and vocational school levels in a variety of academic, topical and vocational subjects; publication of textbooks, educational and instructional course materials and tests distributed via a global computer network; on-line educational testing, namely, preparing, administering and scoring educational tests, and related assessment and counseling services based on test results; providing interactive computer databases in the fields of education and educational training, instruction and testing at the pre-school, grade school, middle school, high school, college, graduate, post graduate, continuing education and vocational school levels in a wide variety of subjects