We offer a wide range of highly interactive courses that you can take entirely over the Internet. All of our courses include expert instructors, many of whom are nationally known authors. Our online courses are affordable, fun, fast, convenient, and geared just for you. Ready to explore our catalog? You can search for a specific class or browse through the catalog by category. If you need help, click on the Help link at the top of this page or call NTX at (847) 446-6600.