Educational services, namely, providing courses of instruction at the post-secondary, college, and post-college levels, and distribution of course material in connection therewith; educational services, namely conducting certification and non-certification corporate training classes, seminars, conferences, and workshops in the fields of business management, computer skills, language training, and human resources, and distribution of course materials in connection therewith; educational services in the nature of post-secondary schools; educational services in the nature of certification and non-certification corporate training programs; educational services, namely, conducting distance learning instruction at the post-secondary, college, and post-college levels